My sons 3DS XL is just over a month old now. Tonight, he was swapping games and it wouldn't read. I tried all 5 games and it gave the same error about nothing being inserted in the slot. I called up Bestbuy and I can return it and pick up another one. My concern is, I only have 1 game downloaded from the eshop (mario 3d land). Can I just pull the SD card out of his and place it in the new one and still have the game plus his game saves and such? Or do I have to do a system transfer? Thanks in advance!