I haven't seen anything like this so I'm wondering, is there any way to use the R4 to backup save files? I tried the ROM dumping function with GBAldr, but I don't know if the SAV file is actually a save file, since someone said it's meant to dump the RAM of the 3-in-1 or something like that. I also want to know if it's possible to overwrite the save file in an official GBA game with a backed up save using the R4. I'm also curious about DS game saves, but I don't know if it would be possible. I've found developers to be very crafty, though, so it might be possible. I'd also like to know if this would be possible if I had the 3-in-1 or other (cheap) slot-2 device.