Slightly OT but for the big sd card int the 3ds itself - can it be larger than 32gb?
Some people have said they've had success with 64GB or higher after reformatting the SDXC exFAT cards to FAT32, but this isn't officially supported by Nintendo.
Did you have to format the card in a particular way? Any advice would be appreciated!I use a 64GB card in mine. No problems, although after ripping all my games I don't have much headroom left either...