When you create a snapshot of a virtual machine in Microsoft Hyper-V, a new file is created with the .avhdx file extension. The name of the file begins with the name of its parent VHDX file, but it also has a GUID following that, uniquely representing that checkpoint (sometimes called snapshots). You can see an example of this in the Windows Explorer screenshot below. Creating lots of snapshots will result in many .avhdx files, which can quickly become unmanageable. Consequently, you might want to merge these files together. If you want to merge the .avhdx file with its parent .vhdx file, it’s quite easy to accomplish. PowerShell Method Windows 10 includes support for a Merge-VHD PowerShell command, which is incredibly easy to use. In fact, you don’t even need to be running PowerShell “as Administrator” in order to merge VHDX files that you have access to. All you need to do is call Merge-VHD with the...
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