it@61@sec 29 Junior Poster in Training

I installed Windows 7 on a guest machine in Virtualbox on my Linux Mint 18 host.
Installation OK, activation OK.
Then I tried to upgrade this guest from Windows 7 to Windows 10 I encountered some problems which rendered my installation useless. While I was working with these problems I created some snapshots so I had a fallback if something went really wrong.

Since I now had a digital right for Windows 10 for this virtual machine I decided to put up a new VDI so I could install a fresh copy of Windows 10 on this. Version 20H2 worked as it should and now I'm happy.. :-)

But: What shall I do with the old (original) VDI-disk and the snapshots on it ?
The whole thing is installed on a Samsung 970 EVO Plus 500 gb M.2 disk and I want to save as much space as possible without harming my new VDI.
Any suggestions ?
Virtuabox version: 6.1.16 r140961 (Qt5.6.1) and both the Extension Pack and the Guest Addons are updated.

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