Thank you Ah OK so the .hds file is a package too - I assumed it was a file. It does indeed contain .hds files which I have now found out is the snapshot suffix. The oldest of these is 77.21Gb (11 May 2020) and there are 4 others which take up about 55 Gb between them. I think I now understand why my VM is so huge. My next questions are why the Snapshot Manager shows the first snapshot as 18/3/2020 and not 11 May as per File Manager, and are they incremental or can I delete the monster one (37 Gb) and still have the security of knowing I have a snapshot that works?