# Resize Root Disk You can increase the disk root size when your VM instance needs additional storage space. You can only resize the root disk to increase its size, you cannot reduce the size of the root disk. * In the **Action** column, click **More**, then select **Resize Root Disk**.

* Enter the size of the **Root Disk** as needed, but the root disk cannot be below **20GB**. then click **Resize Root Disk** to save or **cancel** if you don't change the root disk size.

* There will be a process of expanding the size of the root disk.

Instance Page - Process Increase Root Disk

* New data that has been saved is automatically updated in the Instance list.

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