As long as they're not microSD or like 128 gb of size..Yeah, any SD card works fiine
Well some SD cards are too big to fit in a 3ds....
Then they are not SD cards. There are other letter combinations for other cards, such as XD and I don't know the names of any of the others because I do not use them. If they are too big, I think they are XD, but I could be wrong.
Just on this subject of SD Cards, what is the largest one that the Nintendo 3DS will support?