How do you backup a VHD?

Way 1. Mount Windows image backup VHD with Disk Management

1. Right click This PC -> Manage, select Disk Management, or you can open the Disk Management by pressing Win+X (Win10), select Disk Management.
2. Click Action, select Attach VHD.
3. Then, locate the Windows system image VHD/VHDX file by clicking Browse and hitting OK.