I had a VM (VM1) in VirtualBox that no longer would boot due to a "GURU Meditation" error. So...
- I created a new VM with a fresh install of Windows 10 (VM2), copied all the files associated with VM1 into the VM2 directory and mounted the VDI of VM1 in the Storage GUI of VirtualBox.
- Booted up VM2 and can see the VDI of VM1 which shows (in Explorer) that the "drive" contains 356GB of data (all my old files).
- I took ownership of the "drive" and added permissions to ensure "full control" of the VM1 VDI within VM2. I also set Explorer to view hidden folders.
- When I open the VDI from VM1 it only shows a few folders: MSOCache, $Windows~BT, HP Driver, and a few others. None of my user files are visible! So, Explorer tells me they are there from the "data used" information, but I can't view or access them.
diskmgmt.msc
, it sounds like you have one partition mounted (the wrong partition).