I have a 64GB MicroSD for my phone...
If you guys really want me to try it I can try it, but I'm pretty sure it will work.
That would be amazing! I guarantee there are so many people reading this thread that will purchase a 64GB card if your results are successful. So many of us just bought a Gateway or even a 3DS based on the upcoming Gateway 2.0 (I bought 3 x 3DS and 3 x Gateway for the family myself)
Really appreciate it, please specify all the details of the card if it works, Brand, Model, #, I just had crappy microsd that did not work so I know first hand some don't work.