diff --git a/README.md b/README.md
index 41640c0..9d25e0f 100644
--- a/README.md
+++ b/README.md
@@ -227,6 +227,18 @@ module "windowsservers" {
   enable_accelerated_networking = true
   license_type                  = "Windows_Client"
   identity_type                 = "SystemAssigned" // can be empty, SystemAssigned or UserAssigned
+
+  extra_disks = [
+    {
+      size = 50
+      name = "logs"
+    },
+    {
+      size = 200
+      name = "backup"
+    }
+  ]
+
   os_profile_secrets = [{
     source_vault_id   = data.azurerm_key_vault.example.id
     certificate_url   = data.azurerm_key_vault_certificate.example.secret_id
diff --git a/main.tf b/main.tf
index 3bdd186..4dfec7b 100644
--- a/main.tf
+++ b/main.tf
@@ -80,6 +80,17 @@ resource "azurerm_virtual_machine" "vm-linux" {
     }
   }
 
+  dynamic storage_data_disk {
+    for_each = var.extra_disks
+    content {
+      name              = "${var.vm_hostname}-extradisk-${count.index}-${storage_data_disk.value.name}"
+      create_option     = "Empty"
+      lun               = storage_data_disk.key + var.nb_data_disk
+      disk_size_gb      = storage_data_disk.value.size
+      managed_disk_type = var.data_sa_type
+    }
+  }
+
   os_profile {
     computer_name  = "${var.vm_hostname}-${count.index}"
     admin_username = var.admin_username
@@ -170,6 +181,17 @@ resource "azurerm_virtual_machine" "vm-windows" {
     }
   }
 
+  dynamic storage_data_disk {
+    for_each = var.extra_disks
+    content {
+      name              = "${var.vm_hostname}-extradisk-${count.index}-${storage_data_disk.value.name}"
+      create_option     = "Empty"
+      lun               = storage_data_disk.key + var.nb_data_disk
+      disk_size_gb      = storage_data_disk.value.size
+      managed_disk_type = var.data_sa_type
+    }
+  }
+
   os_profile {
     computer_name  = "${var.vm_hostname}-${count.index}"
     admin_username = var.admin_username
diff --git a/test/fixture/main.tf b/test/fixture/main.tf
index 6c490e1..f534a58 100644
--- a/test/fixture/main.tf
+++ b/test/fixture/main.tf
@@ -86,6 +86,16 @@ module "debianservers" {
   allocation_method   = "Static"
   enable_ssh_key      = true
   extra_ssh_keys      = ["monica_id_rsa.pub"]
+  extra_disks = [
+    {
+      size = 5
+      name = "extra1"
+    },
+    {
+      size = 5
+      name = "extra2"
+    }
+  ]
 
   depends_on = [azurerm_resource_group.test]
 }
diff --git a/variables.tf b/variables.tf
index e392364..f58752e 100644
--- a/variables.tf
+++ b/variables.tf
@@ -221,6 +221,15 @@ variable "identity_ids" {
   default     = []
 }
 
+variable "extra_disks" {
+  description = "(Optional) List of extra data disks attached to each virtual machine."
+  type = list(object({
+    name = string
+    size = number
+  }))
+  default = []
+}
+
 variable "os_profile_secrets" {
   description = "Specifies a list of certificates to be installed on the VM, each list item is a map with the keys source_vault_id, certificate_url and certificate_store."
   type        = list(map(string))