I'm used to backing up NDS save files by copying the ".sav" files from the microSD and pasting it onto my desktop, but I had no idea what to do with my RF4 rom because it didn't create a ".sav file". It was just "v.runfa-2.3ds" and there was no "v.runfa-2.sav." I assumed that the save memory went straight into the ".3ds" file, so I just backed up that and continued to replace the ".3ds" file onto my desktop repeatedly over time. Today, I decided to pick up my 3DS and play RF4 after two months , but I couldn't boot up Gateway Mode, so I was like "eh, there's probably a new gateway update anyway. I'll just replace the launcher.dat file onto my sd card and try again." I did so, but before I booted up gateway mode, while my microSD was still connected to my laptop, I copied the ".3ds" file and replaced it with the old file. I've done this multiple times before, so I didn't think much of it. Anyway, I booted up gateway mode and everything went fine, but as soon as I booted up Rune Factory 4, something was wrong. It showed a message like "Thank you for purchasing this game." It was like the first time I played it; there were no save files or anything. Everything I spent my time on for hours and hours were gone. I have no idea what happened. Afterwards, I was like "oh no, it must have corrupted or something" so I went straight to the file I just saved beforehand and when I put it back into my microSD and tried to reboot it, the game still did not have my save file. What did I do? Can anyone help me try to possibly get my data back or let me know what happened at least? I don't know what I did wrong, and is there any way I can prevent this from now on?