# Increase Storage
You can increase the size of your storage disk when your VM instance requires additional storage space. Storage size can only be increased and cannot be decreased. Before increasing the storage size, make sure the storage is detached from the VM.
* Open the **Storage** page by selecting the **Storage** menu.
* In the **Action** column, click **More**, then select **Detach from Instance**.
* Click **Confirm** to start the storage detachment process.
* A notification will appear displaying the message "**Storage has successfully detach**".
* On the **Storage** page, in the **Action** column, click **More**, then select **Increase Size**.
* Select the desired storage size. Then click **Resize Volume** to continue the resizing process or **Cancel** if you do not want to proceed.
* A notification will appear displaying the message "**Storage has successfully resized**".
* On the **Storage** page, in the **Action** column, click **More**, then select **Attach to Instance**.
* Select the **Instance**, then click **Confirm** to continue the process or **Cancel** to return to the Storage page.
* A notification will appear displaying the message "**Storage has successfully attach**".
