Hi,
I've had my 3ds xl for around 2 mos already and when I bought a physical copy of Shin Megami Tensei IV I encountered this problem. It would say save file corrupted at the beginning once you open the game. While in-game I can save but it doesnt appear when I try to load. There are also instances where this doesn't happen and I can save normally. But when I try to save again after, the same problem happens, I can save but the file doesn't appear on the load screen, including my first save.
I have already tried reformatting the SD card on my pc, buying a new SD card and reformatting it after the problem appeared again, and reformatting the system.
I didn't get this problem with my other games (Fire emblem and Bravely default). I'm starting to think the problem lies with the game cartridge and not with my system and SD cards.
Hope you guys can help. Thanks!