Add Backup Drives to Windows Server Backup – Solved Now!

Do you encounter that Windows Server Backup UI cannot add another disk to a scheduled backup? You may learn quick workarounds from this page.


By Lily Updated on February 4, 2024

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Can’t add backup drives to Windows Server Backup 2012

Windows Server Backup (WSB) is a feature that provides backup and recovery options for Windows server environments. It enables you to create both one-time backup tasks and scheduled backup tasks. However, errors occur sometimes.

Some users find they cannot add an additional disk to a scheduled backup by using the Windows Server Backup Schedule Wizard, only receiving an error message: “The filename, directory name, or volume label syntax is incorrect.” How to deal with it? Please read on.

Windows Server Backup Error

Solutions to Windows Server Backup adding new disk failed

If you fail to add a new drive to Windows Server Backup, you may pick one of the following solutions to fix it.

AOMEI Backupper

If you want an easier way to perform Windows Server backup to multiple drives, try AOMEI Backupper Server.

Solution 1: Reattach the missing disk(s)

The error may occur if a previously-added destination disk is not currently attached to the server, so you can fix it by reattaching the missing disk(s).  After ensuring all the backup destination disks are attached to the server, retry to add an additional disk to a scheduled backup through the Windows Server Backup Schedule Wizard. 

Solution 2: Remove the unavailable disk

If the missing disk is no longer available, you can remove it as a destination disk from the backup wizard to fix the issue. Follow the steps below to remove a destination disk from a scheduled backup:

Note: If the missing disk is the only destination disk defined in the backup schedule, you will receive an error message when you try to remove it. If this occurs, click Stop backup, and then create a new backup schedule.

1. In the Windows Server Backup snap-in, click Backup Schedule to open the Backup Schedule wizard.

2. In the “Modify Scheduled Backup Settings” page, click Modify backup, and then click Next.

3. Leave the Backup Configuration, Backup Time, and Destination Type settings unchanged and click Next.

4. In the “Keep or Change Backup Destinations” page, select Remove current backup destinations, and then click Next.

Remove Backup Destinations

5. Select the backup destination that is no longer attached, and then click Next

Note: Typically, the unavailable disk will have the name "(Disk offline)."

6. Verify that the configuration is correct, and then click Finish.

Solution 3: Use Wbadmin to add disk

Wbadmin is a command-line utility you can use to run backup & restore in Windows Servers. Learn how to add backup drives to Windows Server Backup via Wbadmin command lines below:

1. Right click on the Start button and select Command Prompt (Admin) from the expanded menu.

2. Type wbadmin get disks > C:\disks.txt and press Enter to get disk information and save it in “C:\disks.txt”.

3. Open the text file named “disks” in C drive. Copy the Disk Identifier for the relevant disk you are adding to the backup schedule. It looks like this… {xxxx}

4. Type wbadmin enable backup -addtarget: and paste the Disk Identifier after the colon. Then, press Enter.

5. Type y and press Enter to enable scheduled backups using the settings.

6. Type y and press Enter to format the target disk.

7. When you see “The scheduled backup is enabled”, you can type exit and press Enter to exit Command Prompt.

Add Backup Drive

Easier way to perform Windows Server backup to multiple drives

If you are not familiar with command line operations and want an easier way to perform Windows Server backup, you can turn to specialized backup software for server—AOMEI Backupper Server. 

It supports both Windows PC operating systems (Windows 11/10/8.1/8/7/Vista/XP) and Windows Server operating systems (Windows Server 2022/2019/2016/2012(R2)/2008(R2)/2003, etc).
There are four backup types available: System Backup, Disk Backup, Partition Backup, and File Backup. You can backup the operating system, disks, volumes/partitions, and files/folders based on your needs.
You can set the backup tasks to run automatically using the Schedule Backup feature. You can also choose to run incremental or differential backup under Backup Scheme.

To backup to multiple drives, you may create different backup tasks, and you can set different schedules for them. I’ll show you how to backup system to another drive and schedule Windows Server backup once a week with AOMEI Backupper as follows:

Step 1. Download the free trial of AOMEI Backupper Server. Install and launch it.

Download Free Trial Windows Server & PC
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Step 2. Click on “Backup” and select “System Backup”.

System Backup

Step 3. The required system partition(s) is (are) selected by default. Just choose a destination drive to store the system image.

Select Path

Step 4. Click “Schedule Backup” in the left bottom. In the pop-up window, turn on “Enable Schedule Backup”, select “Weekly” from the drop-down menu and click on days to run the task. If you choose “Monday” and “Friday”, the task will run on the two days every week.


Step 5. In the Schedule window, click “Backup Scheme” from the left panel. “Incremental Backup” is set as the backup method by default. Turn on “Enable Automatic Backup Cleanup” and choose from the 3 scheme types to delete old backups automatically. This will help you manage disk space on the destination drive.

Backup Scheme

Tips: If you change “Incremental Backup” to “Differential Backup”, there will be 4 scheme types available. Refer to backup scheme to learn more.

Step 6. Confirm the operations and click “Start Backup”. Then, choose “Add the schedule and start backup now” to run the first backup immediately or “Only add the schedule” to run it later.

Start Backup

✍ Tips: 

After you have created a backup task with AOMEI Backupper, you can manage it under the Home tab. You are allowed to change the backup drive any time you need through the Edit Backup option.

Edit Backup


If you fail to add backup drives to Windows Server Backup using UI operations, you may use Wbadmin command to fix it. Or you can turn to more advanced server backup software—AOMEI Backupper. It enables you to migrate old server to new server with dissimilar hardware. Why not try it now?

Lily · Editor
Lily Green joined AOMEI in 2018 and has since become a professional in the areas of data protection and data transfer. She is committed to helping users protect their precious computer data and troubleshoot Windows system errors. She consistently stays vigilant about the latest trends in technology, guaranteeing that the given information aligned with the ongoing advancements in the field.