No, The 3DS accept 64 GO MicroSD and you can use guiformat.exe for format in FAT32 the 64 GO MicroSD
I use a 64 GO MicroSD Samsung Evo for Gateway and a 64 GO MicroSD Sandisk for my New3DS
Sorry for my bad english I'm french
Hi!
The best is to have one or two original buy new games.
You dump your games you collect the header to be able to play online.
You could use the same header for all your 3DS games (which will therefore be .3DZ or .CIA games or view that you can play it online with) because you can play with...