When you backup using Windows Server Backup to local disk media, Windows Server Backup creates a shadow copy storage in that Local disk. If the backup in that Local disk is no longer required, we just delete the backup in WindowsImageBackup Folder.
However, the space used in VSS is still being used and I show you how to release unneeded VSS storage used by Windows Server Backup.
S1-1. Open Properties of Local Disk and navigate to Shadow Copies tab. You will notice on Used Space taken
S1-2. Open Command Prompt in Administrator Mode, and execute the following command to list all Shadow Copies and Shadow Storage
VssAdmin List Shadows VssAdmin List ShadowStorage
S1-3. Run DiskShadow.exe command to delete Shadow Copy Volume created by Windows Server Backup
>DiskShadow.exe DISKSHADOW> Delete Shadows Volume F: DISKSHADOW> Exit
If you try to delete using VssAdmin command directly, the command will fail
S1-4. Open Local Disk Properties -> Shadow Copies, the used space is now 0 bytes
S1-5. In Command Prompt, execute VssAdmin Command to delete Shadow Copy Storage
VssAdmin Delete ShadowStorage /For=F: /On=F: /Quiet
S1-6. Open Local Disk Properties -> Shadow Copies again, Shadow Copy Storage on Drive F is no longer exist.