I have a new Kingston 32gb card and I know it works with 3DS games. I have reformatted the card to FAT32. Down loaded the sd_files.zip from this website. I have unzipped and copied the files directly to the SD card root directory. I have unzipped and transfered a few DS games to the root directory. An Insert Stargate to my 3DS, but I see no Alex Rider. I am not using any CFW.