keystore

I reset my PC and forgot to backup my keystore and I can't figure out how to reset it or get it back. Does anyone know how to get it back from my apk so I can update it or something like that? I might have it backed up on my other PC but the hard drives connecter broke and burnt the connecter to the PC and hard drive so I can't connect anything to it because I previously made it on my old PC and it might have a backup of the keystore.

Anything helps!