Recovering data

Hello everyone,
I backupped everything of my system / and home by tarballing it. Because of something happening, my old hard drive was wiped. Can I somehow recover and access the data from the backup of the workstation VM? When adding creating new vms using the vbox and vdi, there is none of the data. Where is it?
Thank you very much

Unspecific to Whonix. Same as if using a Debian VM.

Needs to be resolved as per: