diff --git a/apps/dav/lib/Connector/Sabre/Directory.php b/apps/dav/lib/Connector/Sabre/Directory.php
index 38a84e1484b..101c0d13935 100644
--- a/apps/dav/lib/Connector/Sabre/Directory.php
+++ b/apps/dav/lib/Connector/Sabre/Directory.php
@@ -86,21 +86,8 @@ class Directory extends \OCA\DAV\Connector\Sabre\Node implements \Sabre\DAV\ICol
 	 */
 	public function createFile($name, $data = null) {
 		try {
-			// for chunked upload also updating a existing file is a "createFile"
-			// because we create all the chunks before re-assemble them to the existing file.
-			if (isset($_SERVER['HTTP_OC_CHUNKED'])) {
-				// exit if we can't create a new file and we don't updatable existing file
-				$chunkInfo = \OC_FileChunking::decodeName($name);
-				if (!$this->fileView->isCreatable($this->path) &&
-					!$this->fileView->isUpdatable($this->path . '/' . $chunkInfo['name'])
-				) {
-					throw new \Sabre\DAV\Exception\Forbidden();
-				}
-			} else {
-				// For non-chunked upload it is enough to check if we can create a new file
-				if (!$this->fileView->isCreatable($this->path)) {
-					throw new \Sabre\DAV\Exception\Forbidden();
-				}
+			if (!$this->fileView->isCreatable($this->path)) {
+				throw new \Sabre\DAV\Exception\Forbidden();
 			}
 
 			$this->fileView->verifyPath($this->path, $name);
diff --git a/apps/dav/lib/Connector/Sabre/File.php b/apps/dav/lib/Connector/Sabre/File.php
index ef473340478..0b9199492fe 100644
--- a/apps/dav/lib/Connector/Sabre/File.php
+++ b/apps/dav/lib/Connector/Sabre/File.php
@@ -41,7 +41,6 @@ use Sabre\DAV\Exception;
 use Sabre\DAV\Exception\BadRequest;
 use Sabre\DAV\Exception\Forbidden;
 use Sabre\DAV\Exception\NotFound;
-use Sabre\DAV\Exception\NotImplemented;
 use Sabre\DAV\Exception\ServiceUnavailable;
 use Sabre\DAV\IFile;
 
@@ -118,16 +117,6 @@ class File extends Node implements IFile {
 		// verify path of the target
 		$this->verifyPath();
 
-		// chunked handling
-		$chunkedHeader = $this->request->getHeader('oc-chunked');
-		if ($chunkedHeader) {
-			try {
-				return $this->createFileChunked($data);
-			} catch (\Exception $e) {
-				$this->convertToSabreException($e);
-			}
-		}
-
 		/** @var Storage $partStorage */
 		[$partStorage] = $this->fileView->resolvePath($this->path);
 		$needsPartFile = $partStorage->needsPartFile() && (strlen($this->path) > 1);
@@ -555,135 +544,6 @@ class File extends Node implements IFile {
 		return $storage->getDirectDownload($internalPath);
 	}
 
-	/**
-	 * @param resource $data
-	 * @return null|string
-	 * @throws Exception
-	 * @throws BadRequest
-	 * @throws NotImplemented
-	 * @throws ServiceUnavailable
-	 */
-	private function createFileChunked($data) {
-		[$path, $name] = \Sabre\Uri\split($this->path);
-
-		$info = \OC_FileChunking::decodeName($name);
-		if (empty($info)) {
-			throw new NotImplemented($this->l10n->t('Invalid chunk name'));
-		}
-
-		$chunk_handler = new \OC_FileChunking($info);
-		$bytesWritten = $chunk_handler->store($info['index'], $data);
-
-		//detect aborted upload
-		if ($this->request->getMethod() === 'PUT') {
-			$lengthHeader = $this->request->getHeader('content-length');
-			if ($lengthHeader) {
-				$expected = (int)$lengthHeader;
-				if ($bytesWritten !== $expected) {
-					$chunk_handler->remove($info['index']);
-					throw new BadRequest(
-						$this->l10n->t(
-							'Expected filesize of %1$s but read (from Nextcloud client) and wrote (to Nextcloud storage) %2$s. Could either be a network problem on the sending side or a problem writing to the storage on the server side.',
-							[
-								$this->l10n->n('%n byte', '%n bytes', $expected),
-								$this->l10n->n('%n byte', '%n bytes', $bytesWritten),
-							],
-						)
-					);
-				}
-			}
-		}
-
-		if ($chunk_handler->isComplete()) {
-			/** @var Storage $storage */
-			[$storage,] = $this->fileView->resolvePath($path);
-			$needsPartFile = $storage->needsPartFile();
-			$partFile = null;
-
-			$targetPath = $path . '/' . $info['name'];
-			/** @var \OC\Files\Storage\Storage $targetStorage */
-			[$targetStorage, $targetInternalPath] = $this->fileView->resolvePath($targetPath);
-
-			$exists = $this->fileView->file_exists($targetPath);
-
-			try {
-				$this->fileView->lockFile($targetPath, ILockingProvider::LOCK_SHARED);
-
-				$this->emitPreHooks($exists, $targetPath);
-				$this->fileView->changeLock($targetPath, ILockingProvider::LOCK_EXCLUSIVE);
-				/** @var \OC\Files\Storage\Storage $targetStorage */
-				[$targetStorage, $targetInternalPath] = $this->fileView->resolvePath($targetPath);
-
-				if ($needsPartFile) {
-					// we first assembly the target file as a part file
-					$partFile = $this->getPartFileBasePath($path . '/' . $info['name']) . '.ocTransferId' . $info['transferid'] . '.part';
-					/** @var \OC\Files\Storage\Storage $targetStorage */
-					[$partStorage, $partInternalPath] = $this->fileView->resolvePath($partFile);
-
-
-					$chunk_handler->file_assemble($partStorage, $partInternalPath);
-
-					// here is the final atomic rename
-					$renameOkay = $targetStorage->moveFromStorage($partStorage, $partInternalPath, $targetInternalPath);
-					$fileExists = $targetStorage->file_exists($targetInternalPath);
-					if ($renameOkay === false || $fileExists === false) {
-						\OC::$server->get(LoggerInterface::class)->error('\OC\Files\Filesystem::rename() failed', ['app' => 'webdav']);
-						// only delete if an error occurred and the target file was already created
-						if ($fileExists) {
-							// set to null to avoid double-deletion when handling exception
-							// stray part file
-							$partFile = null;
-							$targetStorage->unlink($targetInternalPath);
-						}
-						$this->fileView->changeLock($targetPath, ILockingProvider::LOCK_SHARED);
-						throw new Exception($this->l10n->t('Could not rename part file assembled from chunks'));
-					}
-				} else {
-					// assemble directly into the final file
-					$chunk_handler->file_assemble($targetStorage, $targetInternalPath);
-				}
-
-				// allow sync clients to send the mtime along in a header
-				$mtimeHeader = $this->request->getHeader('x-oc-mtime');
-				if ($mtimeHeader !== '') {
-					$mtime = $this->sanitizeMtime($mtimeHeader);
-					if ($targetStorage->touch($targetInternalPath, $mtime)) {
-						$this->header('X-OC-MTime: accepted');
-					}
-				}
-
-				// since we skipped the view we need to scan and emit the hooks ourselves
-				$targetStorage->getUpdater()->update($targetInternalPath);
-
-				$this->fileView->changeLock($targetPath, ILockingProvider::LOCK_SHARED);
-
-				$this->emitPostHooks($exists, $targetPath);
-
-				// FIXME: should call refreshInfo but can't because $this->path is not the of the final file
-				$info = $this->fileView->getFileInfo($targetPath);
-
-				$checksumHeader = $this->request->getHeader('oc-checksum');
-				if ($checksumHeader) {
-					$checksum = trim($checksumHeader);
-					$this->fileView->putFileInfo($targetPath, ['checksum' => $checksum]);
-				} elseif ($info->getChecksum() !== null && $info->getChecksum() !== '') {
-					$this->fileView->putFileInfo($this->path, ['checksum' => '']);
-				}
-
-				$this->fileView->unlockFile($targetPath, ILockingProvider::LOCK_SHARED);
-
-				return $info->getEtag();
-			} catch (\Exception $e) {
-				if ($partFile !== null) {
-					$targetStorage->unlink($targetInternalPath);
-				}
-				$this->convertToSabreException($e);
-			}
-		}
-
-		return null;
-	}
-
 	/**
 	 * Convert the given exception to a SabreException instance
 	 *
diff --git a/apps/dav/lib/Connector/Sabre/FilesPlugin.php b/apps/dav/lib/Connector/Sabre/FilesPlugin.php
index d1ed8d83464..3b96f67a82b 100644
--- a/apps/dav/lib/Connector/Sabre/FilesPlugin.php
+++ b/apps/dav/lib/Connector/Sabre/FilesPlugin.php
@@ -642,15 +642,6 @@ class FilesPlugin extends ServerPlugin {
 	 * @throws \Sabre\DAV\Exception\BadRequest
 	 */
 	public function sendFileIdHeader($filePath, ?\Sabre\DAV\INode $node = null) {
-		// chunked upload handling
-		if (isset($_SERVER['HTTP_OC_CHUNKED'])) {
-			[$path, $name] = \Sabre\Uri\split($filePath);
-			$info = \OC_FileChunking::decodeName($name);
-			if (!empty($info)) {
-				$filePath = $path . '/' . $info['name'];
-			}
-		}
-
 		// we get the node for the given $filePath here because in case of afterCreateFile $node is the parent folder
 		if (!$this->server->tree->nodeExists($filePath)) {
 			return;
diff --git a/apps/dav/lib/Connector/Sabre/LockPlugin.php b/apps/dav/lib/Connector/Sabre/LockPlugin.php
index 7bfbb352173..6640771dc31 100644
--- a/apps/dav/lib/Connector/Sabre/LockPlugin.php
+++ b/apps/dav/lib/Connector/Sabre/LockPlugin.php
@@ -42,7 +42,7 @@ class LockPlugin extends ServerPlugin {
 	public function getLock(RequestInterface $request) {
 		// we can't listen on 'beforeMethod:PUT' due to order of operations with setting up the tree
 		// so instead we limit ourselves to the PUT method manually
-		if ($request->getMethod() !== 'PUT' || isset($_SERVER['HTTP_OC_CHUNKED'])) {
+		if ($request->getMethod() !== 'PUT') {
 			return;
 		}
 		try {
@@ -65,7 +65,7 @@ class LockPlugin extends ServerPlugin {
 		if ($this->isLocked === false) {
 			return;
 		}
-		if ($request->getMethod() !== 'PUT' || isset($_SERVER['HTTP_OC_CHUNKED'])) {
+		if ($request->getMethod() !== 'PUT') {
 			return;
 		}
 		try {
diff --git a/apps/dav/lib/Connector/Sabre/ObjectTree.php b/apps/dav/lib/Connector/Sabre/ObjectTree.php
index a7b6cadce35..7ac5b476154 100644
--- a/apps/dav/lib/Connector/Sabre/ObjectTree.php
+++ b/apps/dav/lib/Connector/Sabre/ObjectTree.php
@@ -46,35 +46,6 @@ class ObjectTree extends CachingTree {
 		$this->mountManager = $mountManager;
 	}
 
-	/**
-	 * If the given path is a chunked file name, converts it
-	 * to the real file name. Only applies if the OC-CHUNKED header
-	 * is present.
-	 *
-	 * @param string $path chunk file path to convert
-	 *
-	 * @return string path to real file
-	 */
-	private function resolveChunkFile($path) {
-		if (isset($_SERVER['HTTP_OC_CHUNKED'])) {
-			// resolve to real file name to find the proper node
-			[$dir, $name] = \Sabre\Uri\split($path);
-			if ($dir === '/' || $dir === '.') {
-				$dir = '';
-			}
-
-			$info = \OC_FileChunking::decodeName($name);
-			// only replace path if it was really the chunked file
-			if (isset($info['transferid'])) {
-				// getNodePath is called for multiple nodes within a chunk
-				// upload call
-				$path = $dir . '/' . $info['name'];
-				$path = ltrim($path, '/');
-			}
-		}
-		return $path;
-	}
-
 	/**
 	 * Returns the INode object for the requested path
 	 *
@@ -126,9 +97,6 @@ class ObjectTree extends CachingTree {
 				$info = null;
 			}
 		} else {
-			// resolve chunk file name to real name, if applicable
-			$path = $this->resolveChunkFile($path);
-
 			// read from cache
 			try {
 				$info = $this->fileView->getFileInfo($path);
diff --git a/apps/dav/lib/Connector/Sabre/QuotaPlugin.php b/apps/dav/lib/Connector/Sabre/QuotaPlugin.php
index ea6fc12e1cb..deaa4cf672b 100644
--- a/apps/dav/lib/Connector/Sabre/QuotaPlugin.php
+++ b/apps/dav/lib/Connector/Sabre/QuotaPlugin.php
@@ -187,26 +187,11 @@ class QuotaPlugin extends \Sabre\DAV\ServerPlugin {
 			}
 			$req = $this->server->httpRequest;
 
-			// If LEGACY chunked upload
-			if ($req->getHeader('OC-Chunked')) {
-				$info = \OC_FileChunking::decodeName($newName);
-				$chunkHandler = $this->getFileChunking($info);
-				// subtract the already uploaded size to see whether
-				// there is still enough space for the remaining chunks
-				$length -= $chunkHandler->getCurrentSize();
-				// use target file name for free space check in case of shared files
-				$path = rtrim($parentPath, '/') . '/' . $info['name'];
-			}
-
 			// Strip any duplicate slashes
 			$path = str_replace('//', '/', $path);
 
 			$freeSpace = $this->getFreeSpace($path);
 			if ($freeSpace >= 0 && $length > $freeSpace) {
-				// If LEGACY chunked upload, clean up
-				if (isset($chunkHandler)) {
-					$chunkHandler->cleanup();
-				}
 				throw new InsufficientStorage("Insufficient space in $path, $length required, $freeSpace available");
 			}
 		}
@@ -214,11 +199,6 @@ class QuotaPlugin extends \Sabre\DAV\ServerPlugin {
 		return true;
 	}
 
-	public function getFileChunking($info) {
-		// FIXME: need a factory for better mocking support
-		return new \OC_FileChunking($info);
-	}
-
 	public function getLength() {
 		$req = $this->server->httpRequest;
 		$length = $req->getHeader('X-Expected-Entity-Length');
diff --git a/apps/dav/tests/unit/Connector/Sabre/FileTest.php b/apps/dav/tests/unit/Connector/Sabre/FileTest.php
index 2830ccc0f18..060f0294256 100644
--- a/apps/dav/tests/unit/Connector/Sabre/FileTest.php
+++ b/apps/dav/tests/unit/Connector/Sabre/FileTest.php
@@ -210,86 +210,6 @@ class FileTest extends TestCase {
 		$this->assertEmpty($this->listPartFiles($view, ''), 'No stray part files');
 	}
 
-	/**
-	 * Test putting a file using chunking
-	 *
-	 * @dataProvider fopenFailuresProvider
-	 */
-	public function testChunkedPutFails($thrownException, $expectedException, $checkPreviousClass = false): void {
-		// setup
-		$storage = $this->getMockBuilder(Local::class)
-			->onlyMethods(['fopen'])
-			->setConstructorArgs([['datadir' => \OCP\Server::get(ITempManager::class)->getTemporaryFolder()]])
-			->getMock();
-		\OC\Files\Filesystem::mount($storage, [], $this->user . '/');
-		/** @var View|MockObject */
-		$view = $this->getMockBuilder(View::class)
-			->onlyMethods(['getRelativePath', 'resolvePath'])
-			->getMock();
-		$view->expects($this->atLeastOnce())
-			->method('resolvePath')
-			->willReturnCallback(
-				function ($path) use ($storage) {
-					return [$storage, $path];
-				}
-			);
-
-		if ($thrownException !== null) {
-			$storage->expects($this->once())
-				->method('fopen')
-				->will($this->throwException($thrownException));
-		} else {
-			$storage->expects($this->once())
-				->method('fopen')
-				->willReturn(false);
-		}
-
-		$view->expects($this->any())
-			->method('getRelativePath')
-			->willReturnArgument(0);
-
-		$request = new Request([
-			'server' => [
-				'HTTP_OC_CHUNKED' => 'true'
-			]
-		], $this->requestId, $this->config, null);
-
-		$info = new \OC\Files\FileInfo('/test.txt-chunking-12345-2-0', $this->getMockStorage(), null, [
-			'permissions' => \OCP\Constants::PERMISSION_ALL,
-			'type' => FileInfo::TYPE_FOLDER,
-		], null);
-		$file = new \OCA\DAV\Connector\Sabre\File($view, $info, null, $request);
-
-		// put first chunk
-		$file->acquireLock(ILockingProvider::LOCK_SHARED);
-		$this->assertNull($file->put('test data one'));
-		$file->releaseLock(ILockingProvider::LOCK_SHARED);
-
-		$info = new \OC\Files\FileInfo('/test.txt-chunking-12345-2-1', $this->getMockStorage(), null, [
-			'permissions' => \OCP\Constants::PERMISSION_ALL,
-			'type' => FileInfo::TYPE_FOLDER,
-		], null);
-		$file = new \OCA\DAV\Connector\Sabre\File($view, $info, null, $request);
-
-		// action
-		$caughtException = null;
-		try {
-			// last chunk
-			$file->acquireLock(ILockingProvider::LOCK_SHARED);
-			$file->put('test data two');
-			$file->releaseLock(ILockingProvider::LOCK_SHARED);
-		} catch (\Exception $e) {
-			$caughtException = $e;
-		}
-
-		$this->assertInstanceOf($expectedException, $caughtException);
-		if ($checkPreviousClass) {
-			$this->assertInstanceOf(get_class($thrownException), $caughtException->getPrevious());
-		}
-
-		$this->assertEmpty($this->listPartFiles($view, ''), 'No stray part files');
-	}
-
 	/**
 	 * Simulate putting a file to the given path.
 	 *
@@ -418,45 +338,6 @@ class FileTest extends TestCase {
 		}
 	}
 
-	/**
-	 * Test putting a file with string Mtime using chunking
-	 * @dataProvider legalMtimeProvider
-	 */
-	public function testChunkedPutLegalMtime($requestMtime, $resultMtime): void {
-		$request = new Request([
-			'server' => [
-				'HTTP_X_OC_MTIME' => (string)$requestMtime,
-				'HTTP_OC_CHUNKED' => 'true'
-			]
-		], $this->requestId, $this->config, null);
-
-		$file = 'foo.txt';
-
-		if ($resultMtime === null) {
-			$this->expectException(\Sabre\DAV\Exception::class);
-		}
-
-		$this->doPut($file.'-chunking-12345-2-0', null, $request);
-		$this->doPut($file.'-chunking-12345-2-1', null, $request);
-
-		if ($resultMtime !== null) {
-			$this->assertEquals($resultMtime, $this->getFileInfos($file)['mtime']);
-		}
-	}
-
-	/**
-	 * Test putting a file using chunking
-	 */
-	public function testChunkedPut(): void {
-		$request = new Request([
-			'server' => [
-				'HTTP_OC_CHUNKED' => 'true'
-			]
-		], $this->requestId, $this->config, null);
-		$this->assertNull($this->doPut('/test.txt-chunking-12345-2-0', null, $request));
-		$this->assertNotEmpty($this->doPut('/test.txt-chunking-12345-2-1', null, $request));
-	}
-
 	/**
 	 * Test that putting a file triggers create hooks
 	 */
@@ -559,83 +440,6 @@ class FileTest extends TestCase {
 		);
 	}
 
-	/**
-	 * Test that putting a file with chunks triggers create hooks
-	 */
-	public function testPutChunkedFileTriggersHooks(): void {
-		HookHelper::setUpHooks();
-
-		$request = new Request([
-			'server' => [
-				'HTTP_OC_CHUNKED' => 'true'
-			]
-		], $this->requestId, $this->config, null);
-		$this->assertNull($this->doPut('/foo.txt-chunking-12345-2-0', null, $request));
-		$this->assertNotEmpty($this->doPut('/foo.txt-chunking-12345-2-1', null, $request));
-
-		$this->assertCount(4, HookHelper::$hookCalls);
-		$this->assertHookCall(
-			HookHelper::$hookCalls[0],
-			Filesystem::signal_create,
-			'/foo.txt'
-		);
-		$this->assertHookCall(
-			HookHelper::$hookCalls[1],
-			Filesystem::signal_write,
-			'/foo.txt'
-		);
-		$this->assertHookCall(
-			HookHelper::$hookCalls[2],
-			Filesystem::signal_post_create,
-			'/foo.txt'
-		);
-		$this->assertHookCall(
-			HookHelper::$hookCalls[3],
-			Filesystem::signal_post_write,
-			'/foo.txt'
-		);
-	}
-
-	/**
-	 * Test that putting a chunked file triggers update hooks
-	 */
-	public function testPutOverwriteChunkedFileTriggersHooks(): void {
-		$view = \OC\Files\Filesystem::getView();
-		$view->file_put_contents('/foo.txt', 'some content that will be replaced');
-
-		HookHelper::setUpHooks();
-
-		$request = new Request([
-			'server' => [
-				'HTTP_OC_CHUNKED' => 'true'
-			]
-		], $this->requestId, $this->config, null);
-		$this->assertNull($this->doPut('/foo.txt-chunking-12345-2-0', null, $request));
-		$this->assertNotEmpty($this->doPut('/foo.txt-chunking-12345-2-1', null, $request));
-
-		$this->assertCount(4, HookHelper::$hookCalls);
-		$this->assertHookCall(
-			HookHelper::$hookCalls[0],
-			Filesystem::signal_update,
-			'/foo.txt'
-		);
-		$this->assertHookCall(
-			HookHelper::$hookCalls[1],
-			Filesystem::signal_write,
-			'/foo.txt'
-		);
-		$this->assertHookCall(
-			HookHelper::$hookCalls[2],
-			Filesystem::signal_post_update,
-			'/foo.txt'
-		);
-		$this->assertHookCall(
-			HookHelper::$hookCalls[3],
-			Filesystem::signal_post_write,
-			'/foo.txt'
-		);
-	}
-
 	public static function cancellingHook($params): void {
 		self::$hookCalls[] = [
 			'signal' => Filesystem::signal_post_create,
@@ -753,50 +557,6 @@ class FileTest extends TestCase {
 		$this->assertEmpty($this->listPartFiles($view, ''), 'No stray part files');
 	}
 
-	/**
-	 * Test exception during final rename in chunk upload mode
-	 */
-	public function testChunkedPutFailsFinalRename(): void {
-		$view = new \OC\Files\View('/' . $this->user . '/files');
-
-		// simulate situation where the target file is locked
-		$view->lockFile('/test.txt', ILockingProvider::LOCK_EXCLUSIVE);
-
-		$request = new Request([
-			'server' => [
-				'HTTP_OC_CHUNKED' => 'true'
-			]
-		], $this->requestId, $this->config, null);
-
-		$info = new \OC\Files\FileInfo('/' . $this->user . '/files/test.txt-chunking-12345-2-0', $this->getMockStorage(), null, [
-			'permissions' => \OCP\Constants::PERMISSION_ALL,
-			'type' => FileInfo::TYPE_FOLDER,
-		], null);
-		$file = new \OCA\DAV\Connector\Sabre\File($view, $info, null, $request);
-		$file->acquireLock(ILockingProvider::LOCK_SHARED);
-		$this->assertNull($file->put('test data one'));
-		$file->releaseLock(ILockingProvider::LOCK_SHARED);
-
-		$info = new \OC\Files\FileInfo('/' . $this->user . '/files/test.txt-chunking-12345-2-1', $this->getMockStorage(), null, [
-			'permissions' => \OCP\Constants::PERMISSION_ALL,
-			'type' => FileInfo::TYPE_FOLDER,
-		], null);
-		$file = new \OCA\DAV\Connector\Sabre\File($view, $info, null, $request);
-
-		// action
-		$thrown = false;
-		try {
-			$file->acquireLock(ILockingProvider::LOCK_SHARED);
-			$file->put($this->getStream('test data'));
-			$file->releaseLock(ILockingProvider::LOCK_SHARED);
-		} catch (\OCA\DAV\Connector\Sabre\Exception\FileLocked $e) {
-			$thrown = true;
-		}
-
-		$this->assertTrue($thrown);
-		$this->assertEmpty($this->listPartFiles($view, ''), 'No stray part files');
-	}
-
 	/**
 	 * Test put file with invalid chars
 	 */
diff --git a/apps/dav/tests/unit/Connector/Sabre/ObjectTreeTest.php b/apps/dav/tests/unit/Connector/Sabre/ObjectTreeTest.php
index ccdb501f7d3..f0996a17a33 100644
--- a/apps/dav/tests/unit/Connector/Sabre/ObjectTreeTest.php
+++ b/apps/dav/tests/unit/Connector/Sabre/ObjectTreeTest.php
@@ -127,13 +127,8 @@ class ObjectTreeTest extends \Test\TestCase {
 		$inputFileName,
 		$fileInfoQueryPath,
 		$outputFileName,
-		$type,
-		$enableChunkingHeader
+		$type
 	): void {
-		if ($enableChunkingHeader) {
-			$_SERVER['HTTP_OC_CHUNKED'] = true;
-		}
-
 		$rootNode = $this->getMockBuilder(Directory::class)
 			->disableOriginalConstructor()
 			->getMock();
@@ -170,8 +165,6 @@ class ObjectTreeTest extends \Test\TestCase {
 		} else {
 			$this->assertTrue($node instanceof \OCA\DAV\Connector\Sabre\Directory);
 		}
-
-		unset($_SERVER['HTTP_OC_CHUNKED']);
 	}
 
 	public function nodeForPathProvider() {
@@ -182,7 +175,6 @@ class ObjectTreeTest extends \Test\TestCase {
 				'regularfile.txt',
 				'regularfile.txt',
 				'file',
-				false
 			],
 			// regular directory
 			[
@@ -190,31 +182,6 @@ class ObjectTreeTest extends \Test\TestCase {
 				'regulardir',
 				'regulardir',
 				'dir',
-				false
-			],
-			// regular file with chunking
-			[
-				'regularfile.txt',
-				'regularfile.txt',
-				'regularfile.txt',
-				'file',
-				true
-			],
-			// regular directory with chunking
-			[
-				'regulardir',
-				'regulardir',
-				'regulardir',
-				'dir',
-				true
-			],
-			// file with chunky file name
-			[
-				'regularfile.txt-chunking-123566789-10-1',
-				'regularfile.txt',
-				'regularfile.txt',
-				'file',
-				true
 			],
 			// regular file in subdir
 			[
@@ -222,7 +189,6 @@ class ObjectTreeTest extends \Test\TestCase {
 				'subdir/regularfile.txt',
 				'regularfile.txt',
 				'file',
-				false
 			],
 			// regular directory in subdir
 			[
@@ -230,15 +196,6 @@ class ObjectTreeTest extends \Test\TestCase {
 				'subdir/regulardir',
 				'regulardir',
 				'dir',
-				false
-			],
-			// file with chunky file name in subdir
-			[
-				'subdir/regularfile.txt-chunking-123566789-10-1',
-				'subdir/regularfile.txt',
-				'regularfile.txt',
-				'file',
-				true
 			],
 		];
 	}
diff --git a/apps/dav/tests/unit/Connector/Sabre/QuotaPluginTest.php b/apps/dav/tests/unit/Connector/Sabre/QuotaPluginTest.php
index ed4a8b0404a..815837799fd 100644
--- a/apps/dav/tests/unit/Connector/Sabre/QuotaPluginTest.php
+++ b/apps/dav/tests/unit/Connector/Sabre/QuotaPluginTest.php
@@ -143,29 +143,6 @@ class QuotaPluginTest extends TestCase {
 		];
 	}
 
-	/**
-	 * @dataProvider quotaChunkedOkProvider
-	 */
-	public function testCheckQuotaChunkedOk($quota, $chunkTotalSize, $headers): void {
-		$this->init($quota, 'sub/test.txt');
-
-		$mockChunking = $this->getMockBuilder(\OC_FileChunking::class)
-			->disableOriginalConstructor()
-			->getMock();
-		$mockChunking->expects($this->once())
-			->method('getCurrentSize')
-			->willReturn($chunkTotalSize);
-
-		$this->plugin->expects($this->once())
-			->method('getFileChunking')
-			->willReturn($mockChunking);
-
-		$headers['OC-CHUNKED'] = 1;
-		$this->server->httpRequest = new \Sabre\HTTP\Request('POST', 'dummy.file', $headers);
-		$result = $this->plugin->checkQuota('/sub/test.txt-chunking-12345-3-1');
-		$this->assertTrue($result);
-	}
-
 	public function quotaChunkedFailProvider() {
 		return [
 			[400, 0, ['X-EXPECTED-ENTITY-LENGTH' => '1024']],
@@ -178,30 +155,6 @@ class QuotaPluginTest extends TestCase {
 		];
 	}
 
-	/**
-	 * @dataProvider quotaChunkedFailProvider
-	 */
-	public function testCheckQuotaChunkedFail($quota, $chunkTotalSize, $headers): void {
-		$this->expectException(\Sabre\DAV\Exception\InsufficientStorage::class);
-
-		$this->init($quota, 'sub/test.txt');
-
-		$mockChunking = $this->getMockBuilder(\OC_FileChunking::class)
-			->disableOriginalConstructor()
-			->getMock();
-		$mockChunking->expects($this->once())
-			->method('getCurrentSize')
-			->willReturn($chunkTotalSize);
-
-		$this->plugin->expects($this->once())
-			->method('getFileChunking')
-			->willReturn($mockChunking);
-
-		$headers['OC-CHUNKED'] = 1;
-		$this->server->httpRequest = new \Sabre\HTTP\Request('POST', 'dummy.file', $headers);
-		$this->plugin->checkQuota('/sub/test.txt-chunking-12345-3-1');
-	}
-
 	private function buildFileViewMock($quota, $checkedPath) {
 		// mock filesysten
 		$view = $this->getMockBuilder(View::class)
diff --git a/apps/dav/tests/unit/Connector/Sabre/RequestTest/UploadTest.php b/apps/dav/tests/unit/Connector/Sabre/RequestTest/UploadTest.php
index 286bba7d196..60decd4c846 100644
--- a/apps/dav/tests/unit/Connector/Sabre/RequestTest/UploadTest.php
+++ b/apps/dav/tests/unit/Connector/Sabre/RequestTest/UploadTest.php
@@ -74,115 +74,4 @@ class UploadTest extends RequestTestCase {
 		$result = $this->request($view, $user, 'pass', 'PUT', '/foo.txt', 'asd');
 		$this->assertEquals(Http::STATUS_LOCKED, $result->getStatus());
 	}
-
-	public function testChunkedUpload(): void {
-		$user = $this->getUniqueID();
-		$view = $this->setupUser($user, 'pass');
-
-		$this->assertFalse($view->file_exists('foo.txt'));
-		$response = $this->request($view, $user, 'pass', 'PUT', '/foo.txt-chunking-123-2-0', 'asd', ['OC-Chunked' => '1']);
-
-		$this->assertEquals(201, $response->getStatus());
-		$this->assertFalse($view->file_exists('foo.txt'));
-
-		$response = $this->request($view, $user, 'pass', 'PUT', '/foo.txt-chunking-123-2-1', 'bar', ['OC-Chunked' => '1']);
-
-		$this->assertEquals(Http::STATUS_CREATED, $response->getStatus());
-		$this->assertTrue($view->file_exists('foo.txt'));
-
-		$this->assertEquals('asdbar', $view->file_get_contents('foo.txt'));
-
-		$info = $view->getFileInfo('foo.txt');
-		$this->assertInstanceOf('\OC\Files\FileInfo', $info);
-		$this->assertEquals(6, $info->getSize());
-	}
-
-	public function testChunkedUploadOverWrite(): void {
-		$user = $this->getUniqueID();
-		$view = $this->setupUser($user, 'pass');
-
-		$view->file_put_contents('foo.txt', 'bar');
-		$response = $this->request($view, $user, 'pass', 'PUT', '/foo.txt-chunking-123-2-0', 'asd', ['OC-Chunked' => '1']);
-
-		$this->assertEquals(Http::STATUS_CREATED, $response->getStatus());
-		$this->assertEquals('bar', $view->file_get_contents('foo.txt'));
-
-		$response = $this->request($view, $user, 'pass', 'PUT', '/foo.txt-chunking-123-2-1', 'bar', ['OC-Chunked' => '1']);
-
-		$this->assertEquals(Http::STATUS_CREATED, $response->getStatus());
-
-		$this->assertEquals('asdbar', $view->file_get_contents('foo.txt'));
-
-		$info = $view->getFileInfo('foo.txt');
-		$this->assertInstanceOf('\OC\Files\FileInfo', $info);
-		$this->assertEquals(6, $info->getSize());
-	}
-
-	public function testChunkedUploadOutOfOrder(): void {
-		$user = $this->getUniqueID();
-		$view = $this->setupUser($user, 'pass');
-
-		$this->assertFalse($view->file_exists('foo.txt'));
-		$response = $this->request($view, $user, 'pass', 'PUT', '/foo.txt-chunking-123-2-1', 'bar', ['OC-Chunked' => '1']);
-
-		$this->assertEquals(Http::STATUS_CREATED, $response->getStatus());
-		$this->assertFalse($view->file_exists('foo.txt'));
-
-		$response = $this->request($view, $user, 'pass', 'PUT', '/foo.txt-chunking-123-2-0', 'asd', ['OC-Chunked' => '1']);
-
-		$this->assertEquals(201, $response->getStatus());
-		$this->assertTrue($view->file_exists('foo.txt'));
-
-		$this->assertEquals('asdbar', $view->file_get_contents('foo.txt'));
-
-		$info = $view->getFileInfo('foo.txt');
-		$this->assertInstanceOf('\OC\Files\FileInfo', $info);
-		$this->assertEquals(6, $info->getSize());
-	}
-
-	public function testChunkedUploadOutOfOrderReadLocked(): void {
-		$user = $this->getUniqueID();
-		$view = $this->setupUser($user, 'pass');
-
-		$this->assertFalse($view->file_exists('foo.txt'));
-
-		$view->lockFile('/foo.txt', ILockingProvider::LOCK_SHARED);
-
-		try {
-			$response = $this->request($view, $user, 'pass', 'PUT', '/foo.txt-chunking-123-2-1', 'bar', ['OC-Chunked' => '1']);
-		} catch (\OCA\DAV\Connector\Sabre\Exception\FileLocked $e) {
-			$this->fail('Didn\'t expect locked error for the first chunk on read lock');
-			return;
-		}
-
-		$this->assertEquals(Http::STATUS_CREATED, $response->getStatus());
-		$this->assertFalse($view->file_exists('foo.txt'));
-
-		// last chunk should trigger the locked error since it tries to assemble
-		$result = $this->request($view, $user, 'pass', 'PUT', '/foo.txt-chunking-123-2-0', 'asd', ['OC-Chunked' => '1']);
-		$this->assertEquals(Http::STATUS_LOCKED, $result->getStatus());
-	}
-
-	public function testChunkedUploadOutOfOrderWriteLocked(): void {
-		$user = $this->getUniqueID();
-		$view = $this->setupUser($user, 'pass');
-
-		$this->assertFalse($view->file_exists('foo.txt'));
-
-		$view->lockFile('/foo.txt', ILockingProvider::LOCK_EXCLUSIVE);
-
-		try {
-			$response = $this->request($view, $user, 'pass', 'PUT', '/foo.txt-chunking-123-2-1', 'bar', ['OC-Chunked' => '1']);
-		} catch (\OCA\DAV\Connector\Sabre\Exception\FileLocked $e) {
-			$this->fail('Didn\'t expect locked error for the first chunk on write lock'); // maybe forbid this in the future for write locks only?
-			return;
-		}
-
-		$this->assertEquals(Http::STATUS_CREATED, $response->getStatus());
-		$this->assertFalse($view->file_exists('foo.txt'));
-
-		// last chunk should trigger the locked error since it tries to assemble
-		$result = $this->request($view, $user, 'pass', 'PUT', '/foo.txt-chunking-123-2-0', 'asd', ['OC-Chunked' => '1']);
-		$this->assertEquals(Http::STATUS_LOCKED, $result->getStatus());
-	}
 }
diff --git a/build/integration/dav_features/webdav-related.feature b/build/integration/dav_features/webdav-related.feature
index 2aaa917c075..fdf633bd580 100644
--- a/build/integration/dav_features/webdav-related.feature
+++ b/build/integration/dav_features/webdav-related.feature
@@ -279,33 +279,6 @@ Feature: webdav-related
 		When Sending a "PROPFIND" to "/remote.php/webdav/welcome.txt" with requesttoken
 		Then the HTTP status code should be "207"
 
-	Scenario: Upload chunked file asc
-		Given user "user0" exists
-		And user "user0" uploads chunk file "1" of "3" with "AAAAA" to "/myChunkedFile.txt"
-		And user "user0" uploads chunk file "2" of "3" with "BBBBB" to "/myChunkedFile.txt"
-		And user "user0" uploads chunk file "3" of "3" with "CCCCC" to "/myChunkedFile.txt"
-		When As an "user0"
-		And Downloading file "/myChunkedFile.txt"
-		Then Downloaded content should be "AAAAABBBBBCCCCC"
-
-	Scenario: Upload chunked file desc
-		Given user "user0" exists
-		And user "user0" uploads chunk file "3" of "3" with "CCCCC" to "/myChunkedFile.txt"
-		And user "user0" uploads chunk file "2" of "3" with "BBBBB" to "/myChunkedFile.txt"
-		And user "user0" uploads chunk file "1" of "3" with "AAAAA" to "/myChunkedFile.txt"
-		When As an "user0"
-		And Downloading file "/myChunkedFile.txt"
-		Then Downloaded content should be "AAAAABBBBBCCCCC"
-
-	Scenario: Upload chunked file random
-		Given user "user0" exists
-		And user "user0" uploads chunk file "2" of "3" with "BBBBB" to "/myChunkedFile.txt"
-		And user "user0" uploads chunk file "3" of "3" with "CCCCC" to "/myChunkedFile.txt"
-		And user "user0" uploads chunk file "1" of "3" with "AAAAA" to "/myChunkedFile.txt"
-		When As an "user0"
-		And Downloading file "/myChunkedFile.txt"
-		Then Downloaded content should be "AAAAABBBBBCCCCC"
-
 	Scenario: A file that is not shared does not have a share-types property
 		Given user "user0" exists
 		And user "user0" created a folder "/test"
diff --git a/build/integration/features/bootstrap/ChecksumsContext.php b/build/integration/features/bootstrap/ChecksumsContext.php
index 5661015e714..7909d077d7c 100644
--- a/build/integration/features/bootstrap/ChecksumsContext.php
+++ b/build/integration/features/bootstrap/ChecksumsContext.php
@@ -211,31 +211,4 @@ class ChecksumsContext implements \Behat\Behat\Context\Context {
 			throw new \Exception("Expected no checksum header but got ".$this->response->getHeader('OC-Checksum')[0]);
 		}
 	}
-
-	/**
-	 * @Given user :user uploads chunk file :num of :total with :data to :destination with checksum :checksum
-	 * @param string $user
-	 * @param int $num
-	 * @param int $total
-	 * @param string $data
-	 * @param string $destination
-	 * @param string $checksum
-	 */
-	public function userUploadsChunkFileOfWithToWithChecksum($user, $num, $total, $data, $destination, $checksum) {
-		$num -= 1;
-		$this->response = $this->client->put(
-			$this->baseUrl . '/remote.php/webdav' . $destination . '-chunking-42-'.$total.'-'.$num,
-			[
-				'auth' => [
-					$user,
-					$this->getPasswordForUser($user)
-				],
-				'body' => $data,
-				'headers' => [
-					'OC-Checksum' => $checksum,
-					'OC-Chunked' => '1',
-				]
-			]
-		);
-	}
 }
diff --git a/build/integration/features/bootstrap/WebDav.php b/build/integration/features/bootstrap/WebDav.php
index c2de207284d..852317f76a3 100644
--- a/build/integration/features/bootstrap/WebDav.php
+++ b/build/integration/features/bootstrap/WebDav.php
@@ -683,21 +683,6 @@ trait WebDav {
 		}
 	}
 
-	/**
-	 * @Given user :user uploads chunk file :num of :total with :data to :destination
-	 * @param string $user
-	 * @param int $num
-	 * @param int $total
-	 * @param string $data
-	 * @param string $destination
-	 */
-	public function userUploadsChunkFileOfWithToWithChecksum($user, $num, $total, $data, $destination) {
-		$num -= 1;
-		$data = \GuzzleHttp\Psr7\Utils::streamFor($data);
-		$file = $destination . '-chunking-42-' . $total . '-' . $num;
-		$this->makeDavRequest($user, 'PUT', $file, ['OC-Chunked' => '1'], $data, "uploads");
-	}
-
 	/**
 	 * @Given user :user uploads bulked files :name1 with :content1 and :name2 with :content2 and :name3 with :content3
 	 * @param string $user
diff --git a/build/integration/federation_features/federated.feature b/build/integration/federation_features/federated.feature
index 37c43c1191e..81a3d3abd02 100644
--- a/build/integration/federation_features/federated.feature
+++ b/build/integration/federation_features/federated.feature
@@ -247,40 +247,6 @@ Feature: federated
 		#And Downloading file "/PARENT (2)/textfile0.txt" with range "bytes=0-8"
 		#Then Downloaded content should be "BLABLABLA"
 
-	Scenario: Overwrite a federated shared file as recipient using old chunking
-		Given Using server "REMOTE"
-		And user "user1" exists
-		And user "user2" exists
-		And Using server "LOCAL"
-		And user "user0" exists
-		And User "user0" from server "LOCAL" shares "/textfile0.txt" with user "user1" from server "REMOTE"
-		And User "user1" from server "REMOTE" accepts last pending share
-		And Using server "REMOTE"
-		And As an "user1"
-		#And user "user1" uploads chunk file "1" of "3" with "AAAAA" to "/textfile0 (2).txt"
-		#And user "user1" uploads chunk file "2" of "3" with "BBBBB" to "/textfile0 (2).txt"
-		#And user "user1" uploads chunk file "3" of "3" with "CCCCC" to "/textfile0 (2).txt"
-		#When Downloading file "/textfile0 (2).txt" with range "bytes=0-4"
-		#Then Downloaded content should be "AAAAA"
-
-	Scenario: Overwrite a federated shared folder as recipient using old chunking
-		Given Using server "REMOTE"
-		And user "user1" exists
-		And user "user2" exists
-		And Using server "LOCAL"
-		And user "user0" exists
-		And User "user0" from server "LOCAL" shares "/PARENT" with user "user1" from server "REMOTE"
-		And User "user1" from server "REMOTE" accepts last pending share
-		And Using server "REMOTE"
-		And As an "user1"
-		#And user "user1" uploads chunk file "1" of "3" with "AAAAA" to "/PARENT (2)/textfile0.txt"
-		#And user "user1" uploads chunk file "2" of "3" with "BBBBB" to "/PARENT (2)/textfile0.txt"
-		#And user "user1" uploads chunk file "3" of "3" with "CCCCC" to "/PARENT (2)/textfile0.txt"
-		#When Downloading file "/PARENT (2)/textfile0.txt" with range "bytes=3-13"
-		#Then Downloaded content should be "AABBBBBCCCC"
-
-
-
 	Scenario: List federated share from another server not accepted yet
 		Given Using server "LOCAL"
 		And user "user0" exists
diff --git a/build/integration/files_features/checksums.feature b/build/integration/files_features/checksums.feature
index bc70cfc09b7..d797c7a503e 100644
--- a/build/integration/files_features/checksums.feature
+++ b/build/integration/files_features/checksums.feature
@@ -61,19 +61,3 @@ Feature: checksums
     When user "user0" uploads file "data/textfile.txt" to "/myChecksumFile.txt"
     And user "user0" downloads the file "/myChecksumFile.txt"
     Then The OC-Checksum header should not be there
-
-  Scenario: Uploading a chunked file with checksum should return the checksum in the propfind
-    Given user "user0" exists
-    And user "user0" uploads chunk file "1" of "3" with "AAAAA" to "/myChecksumFile.txt" with checksum "MD5:e892fdd61a74bc89cd05673cc2e22f88"
-    And user "user0" uploads chunk file "2" of "3" with "BBBBB" to "/myChecksumFile.txt" with checksum "MD5:e892fdd61a74bc89cd05673cc2e22f88"
-    And user "user0" uploads chunk file "3" of "3" with "CCCCC" to "/myChecksumFile.txt" with checksum "MD5:e892fdd61a74bc89cd05673cc2e22f88"
-    When user "user0" request the checksum of "/myChecksumFile.txt" via propfind
-    Then The webdav checksum should match "MD5:e892fdd61a74bc89cd05673cc2e22f88"
-
-  Scenario: Uploading a chunked file with checksum should return the checksum in the download header
-    Given user "user0" exists
-    And user "user0" uploads chunk file "1" of "3" with "AAAAA" to "/myChecksumFile.txt" with checksum "MD5:e892fdd61a74bc89cd05673cc2e22f88"
-    And user "user0" uploads chunk file "2" of "3" with "BBBBB" to "/myChecksumFile.txt" with checksum "MD5:e892fdd61a74bc89cd05673cc2e22f88"
-    And user "user0" uploads chunk file "3" of "3" with "CCCCC" to "/myChecksumFile.txt" with checksum "MD5:e892fdd61a74bc89cd05673cc2e22f88"
-    When user "user0" downloads the file "/myChecksumFile.txt"
-    Then The header checksum should match "MD5:e892fdd61a74bc89cd05673cc2e22f88"
diff --git a/lib/composer/composer/autoload_classmap.php b/lib/composer/composer/autoload_classmap.php
index 0837fe2ab62..17479170f0d 100644
--- a/lib/composer/composer/autoload_classmap.php
+++ b/lib/composer/composer/autoload_classmap.php
@@ -1909,7 +1909,6 @@ return array(
     'OC_API' => $baseDir . '/lib/private/legacy/OC_API.php',
     'OC_App' => $baseDir . '/lib/private/legacy/OC_App.php',
     'OC_Defaults' => $baseDir . '/lib/private/legacy/OC_Defaults.php',
-    'OC_FileChunking' => $baseDir . '/lib/private/legacy/OC_FileChunking.php',
     'OC_Files' => $baseDir . '/lib/private/legacy/OC_Files.php',
     'OC_Helper' => $baseDir . '/lib/private/legacy/OC_Helper.php',
     'OC_Hook' => $baseDir . '/lib/private/legacy/OC_Hook.php',
diff --git a/lib/composer/composer/autoload_static.php b/lib/composer/composer/autoload_static.php
index b7f11b43266..a5b707220d2 100644
--- a/lib/composer/composer/autoload_static.php
+++ b/lib/composer/composer/autoload_static.php
@@ -1942,7 +1942,6 @@ class ComposerStaticInit749170dad3f5e7f9ca158f5a9f04f6a2
         'OC_API' => __DIR__ . '/../../..' . '/lib/private/legacy/OC_API.php',
         'OC_App' => __DIR__ . '/../../..' . '/lib/private/legacy/OC_App.php',
         'OC_Defaults' => __DIR__ . '/../../..' . '/lib/private/legacy/OC_Defaults.php',
-        'OC_FileChunking' => __DIR__ . '/../../..' . '/lib/private/legacy/OC_FileChunking.php',
         'OC_Files' => __DIR__ . '/../../..' . '/lib/private/legacy/OC_Files.php',
         'OC_Helper' => __DIR__ . '/../../..' . '/lib/private/legacy/OC_Helper.php',
         'OC_Hook' => __DIR__ . '/../../..' . '/lib/private/legacy/OC_Hook.php',
diff --git a/lib/private/legacy/OC_FileChunking.php b/lib/private/legacy/OC_FileChunking.php
deleted file mode 100644
index 7600d810657..00000000000
--- a/lib/private/legacy/OC_FileChunking.php
+++ /dev/null
@@ -1,161 +0,0 @@
-<?php
-
-/**
- * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
- * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-class OC_FileChunking {
-	protected $info;
-	protected $cache;
-
-	/**
-	 * TTL of chunks
-	 *
-	 * @var int
-	 */
-	protected $ttl;
-
-	public static function decodeName($name) {
-		preg_match('/(?P<name>.*)-chunking-(?P<transferid>\d+)-(?P<chunkcount>\d+)-(?P<index>\d+)/', $name, $matches);
-		return $matches;
-	}
-
-	/**
-	 * @param string[] $info
-	 */
-	public function __construct($info) {
-		$this->info = $info;
-		$this->ttl = \OC::$server->getConfig()->getSystemValueInt('cache_chunk_gc_ttl', 86400);
-	}
-
-	public function getPrefix() {
-		$name = $this->info['name'];
-		$transferid = $this->info['transferid'];
-
-		return $name.'-chunking-'.$transferid.'-';
-	}
-
-	protected function getCache() {
-		if (!isset($this->cache)) {
-			$this->cache = new \OC\Cache\File();
-		}
-		return $this->cache;
-	}
-
-	/**
-	 * Stores the given $data under the given $key - the number of stored bytes is returned
-	 *
-	 * @param string $index
-	 * @param resource $data
-	 * @return int
-	 */
-	public function store($index, $data) {
-		$cache = $this->getCache();
-		$name = $this->getPrefix().$index;
-		$cache->set($name, $data, $this->ttl);
-
-		return $cache->size($name);
-	}
-
-	public function isComplete() {
-		$prefix = $this->getPrefix();
-		$cache = $this->getCache();
-		$chunkcount = (int)$this->info['chunkcount'];
-
-		for ($i = ($chunkcount - 1); $i >= 0; $i--) {
-			if (!$cache->hasKey($prefix.$i)) {
-				return false;
-			}
-		}
-
-		return true;
-	}
-
-	/**
-	 * Assembles the chunks into the file specified by the path.
-	 * Chunks are deleted afterwards.
-	 *
-	 * @param resource $f target path
-	 *
-	 * @return integer assembled file size
-	 *
-	 * @throws \OC\InsufficientStorageException when file could not be fully
-	 * assembled due to lack of free space
-	 */
-	public function assemble($f) {
-		$cache = $this->getCache();
-		$prefix = $this->getPrefix();
-		$count = 0;
-		for ($i = 0; $i < $this->info['chunkcount']; $i++) {
-			$chunk = $cache->get($prefix.$i);
-			// remove after reading to directly save space
-			$cache->remove($prefix.$i);
-			$count += fwrite($f, $chunk);
-			// let php release the memory to work around memory exhausted error with php 5.6
-			$chunk = null;
-		}
-
-		return $count;
-	}
-
-	/**
-	 * Returns the size of the chunks already present
-	 * @return integer size in bytes
-	 */
-	public function getCurrentSize() {
-		$cache = $this->getCache();
-		$prefix = $this->getPrefix();
-		$total = 0;
-		for ($i = 0; $i < $this->info['chunkcount']; $i++) {
-			$total += $cache->size($prefix.$i);
-		}
-		return $total;
-	}
-
-	/**
-	 * Removes all chunks which belong to this transmission
-	 */
-	public function cleanup() {
-		$cache = $this->getCache();
-		$prefix = $this->getPrefix();
-		for ($i = 0; $i < $this->info['chunkcount']; $i++) {
-			$cache->remove($prefix.$i);
-		}
-	}
-
-	/**
-	 * Removes one specific chunk
-	 * @param string $index
-	 */
-	public function remove($index) {
-		$cache = $this->getCache();
-		$prefix = $this->getPrefix();
-		$cache->remove($prefix.$index);
-	}
-
-	/**
-	 * Assembles the chunks into the file specified by the path.
-	 * Also triggers the relevant hooks and proxies.
-	 *
-	 * @param \OC\Files\Storage\Storage $storage storage
-	 * @param string $path target path relative to the storage
-	 * @return bool true on success or false if file could not be created
-	 *
-	 * @throws \OC\ServerNotAvailableException
-	 */
-	public function file_assemble($storage, $path) {
-		// use file_put_contents as method because that best matches what this function does
-		if (\OC\Files\Filesystem::isValidPath($path)) {
-			$target = $storage->fopen($path, 'w');
-			if ($target) {
-				$count = $this->assemble($target);
-				fclose($target);
-				return $count > 0;
-			} else {
-				return false;
-			}
-		}
-		return false;
-	}
-}
diff --git a/tests/lib/FileChunkingTest.php b/tests/lib/FileChunkingTest.php
deleted file mode 100644
index b69154ea1c3..00000000000
--- a/tests/lib/FileChunkingTest.php
+++ /dev/null
@@ -1,58 +0,0 @@
-<?php
-/**
- * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
- * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-namespace Test;
-
-use OCP\ICache;
-
-class FileChunkingTest extends \Test\TestCase {
-	public function dataIsComplete() {
-		return [
-			[1, [], false],
-			[1, [0], true],
-			[2, [], false],
-			[2, [0], false],
-			[2, [1], false],
-			[2, [0,1], true],
-			[10, [], false],
-			[10, [0,1,2,3,4,5,6,7,8], false],
-			[10, [1,2,3,4,5,6,7,8,9], false],
-			[10, [0,1,2,3,5,6,7,8,9], false],
-			[10, [0,1,2,3,4,5,6,7,8,9], true],
-		];
-	}
-
-	/**
-	 * @dataProvider dataIsComplete
-	 * @param $total
-	 * @param array $present
-	 * @param $expected
-	 */
-	public function testIsComplete($total, array $present, $expected) {
-		$fileChunking = $this->getMockBuilder(\OC_FileChunking::class)
-			->setMethods(['getCache'])
-			->setConstructorArgs([[
-				'name' => 'file',
-				'transferid' => '42',
-				'chunkcount' => $total,
-			]])
-			->getMock();
-
-		$cache = $this->createMock(ICache::class);
-
-		$cache->expects($this->atLeastOnce())
-			->method('hasKey')
-			->willReturnCallback(function ($key) use ($present) {
-				$data = explode('-', $key);
-				return in_array($data[3], $present);
-			});
-
-		$fileChunking->method('getCache')->willReturn($cache);
-
-		$this->assertEquals($expected, $fileChunking->isComplete());
-	}
-}