What is the prime size microsd card for the new3ds xl? What do most users here use? I've heard that you can get as big as 128gb but I also heard that it would read slower the bigger it gets, so is it best to use 32gb or 16gb? would 16gb be faster than 32gb because it's smaller? You can put all the ds backups in the microsd as long as it has the space to fit in right?