I'm using a 32GB Sandisk Ultra mSD and my 2DS is working mostly fine. There is one bug that I have been able to reproduce. This is while I was using emunand. 1. Press SELECT to open multirom menu. 2. Press A to pick any ROM. 3. After the game appears press SELECT to open multirom menu again. 4. Press B and the 2DS freezes and requires holding the power button to power off and reboot. I asked my friend to try this on his 3DS XL, but instead of freezing he just can't load anymore ROMs until he restarts. If anyone else tries these steps to see if their 2DS, 3DS, XL freezes as well, please let me know what happened and on what system. This isn't a big deal or anything as I just avoid pressing B in the multirom menu, otherwise everything is fine.