Recovered files (not apkg)

So I had someone format my system and the guy did not understand he could not delete anki.
Anyway, thought I had lost the backups, but it turns out the technician could recover the automatic backups. The problem is - when I try to import the decks (using the backups), I get an error message “this does not seem to be a valid akpg file”; Does anyone know how I can solve this problem?
Thanks in advance.

I’m afraid that indicates the files are corrupt, and have likely not been recovered correctly. The technician could rename them to .zip and see if they can repair the files, but if that does not work then I’m afraid you’re out of luck :frowning: