Wow, awesome PS5 console features, Sony. Can't just let us transfer individual save files through USB devices like on the PS4. No, we have to either shell out money to use cloud saves or resort to the backup system that can only transfer saves in bulk and overwrites everything in the destination. Except that the PS5 can end up creating a corrupted backup file that's undetected until you attempt to restore from it, at which point only then are you informed of the corruption followed immediately by losing everything as the PS5 factory-resets because of course the console doesn't first check the integrity of the backup file just in case. Oh, and there's fuck-all information about the error code CE-100511-8.
So this just happened to me because I wanted to have a backup save in Stellar Blade when I got to the Point of No Return at the endgame after 40 hours, having to resort to the console backup system, and then I wanted to go back to that save when I found out that I permanently missed some collectibles in a segment I just went through. Now I have to do a speedrun all the way from the beginning just to finish the game. And there went my 90-hour Final Fantasy XVI save file too, which is a pain if I want to go back to it for the DLC.