Nintendo officially only supports memory cards up to 32GB -- no matter whether you're using SD or microSD cards and which 3DS iteration you own. There's no guarantee a larger one will work, though ...

Wondering how to upgrade the standard SD/microSD Card that came with your 3DS handheld to a bigger one, such as a 16GB or 32GB? If you're low on space, you can replace the SD Card that came with your ...