The R4 Cards, Such as R4 DS Card, R4i SDHC, R4 SDHC V2.10T, R4i Gold, Cyclo DS Evolution are Amazing Slot-1 Little Device for Nintendo DS, DSi, DSi XL that allow you to make backup of those games you already own. They can also store images, music, E-books and movies on a with a microSD/SDHC TransFlash(TF) memory card.