Yea it will work for awhile. But 3ds software doesn't support it. To start you get slower read/write times than you should and eventually the 3ds firmware will corrupt the card.Nah, format the sdxc card properly, take good care of it, and it works as well in the 3DS as a standard or sdhc card.
Just because you haven't ran into that point where the lack of support causes corruption doesn't mean it doesn't exist.





