If you have a 3DS i think a better option would be to use GBA VC or a GBA emulator, as GBA VC is native GBA and its compatibility is high, and with both of those options you don't risk corrupting your SD.I know, but I would rather my flashcard (~8GB SD) gets corrupted rather than my 128GB 3DS main card (which needs to work in order for my custom firmware to run). I was just wondering if performance and everything would be the same