I'mma be real, if your PC gets a BSoD in 2024, I think you've got bigger problems than a game where you forgot to save for 4 hours. BSoDs are pretty rare these days.
That said, the game's got SOME kind of autosave, I think it saves whenever you quit the game normally, by either the X button or the quit game button, because I've never hit any kind of save button but all my characters I've ever made were saved at some point.