I’d been happily playing for 9+ hours and was doing some backtracking on Disc 3 when after going to save I notice my Save Data wasn’t there, all 3 slots were empty with a notice saying there wasn’t enough space. I eject the disc door, go to memory manager and indeed my save file had vanished, i cleared out some space, plugged in my Action Replay and copied the backup I made last night onto the system and discovered to my horror, the save file was missing 3 hours and was at the final boss of Disc 2.
Nothing was wrong with the battery as all my other saves were still there but I’m a bit upset about this