If I'm right, on FBI, you have to install gba game to SD and not to NAND. The NAND/SD that FBI show you isnt "really" sysnand and emunand.
If you launch FBI in emunand and choose NAND, it will be on the NAND of emunand. (well, I dont explain it easily haha)
gba game: boot sysnand patched (L at boot with luma iirc), install gba game with FBI destination SD.
If you launch FBI in emunand and choose NAND, it will be on the NAND of emunand. (well, I dont explain it easily haha)
gba game: boot sysnand patched (L at boot with luma iirc), install gba game with FBI destination SD.
