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It is aewsome. You can put 2 GB of games in it at once. But you can switch the games out. You can also trade memory. YOu can also put in Cheats, AR cheats. It is really godd. All of my cousins my age and my sibling have it. We is awesome. It is kinda of like an F-Card. But for an R4, you can put in AR cheats.