Save file not backed up?

so my original save file got corrupted, so I went to the backup and it sent me to the start of the game. I already deleted the corrupted save file, it had 80 HOURS OF PLAY. is there anyway i could get it back. also why was my save file not backed up?
this is becoming a really annoying issue, and it was the reason I deleted insurgence s couple months back. and it keeps happening to me