[Keyser.]

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Awesome thanks for the response, I went to that R4DS website but I'm not to sure what that is?

From what I can tell it adds an extra memory and an application that would support a large array of multimedia files.

Does it also allow you to "back-up" games like I think it suggests?

Also what is the "homebrew" games it refers to?

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Bump does anyone know the answer to this?

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It is a little chip thingy that takes a micro SD card and fits into the game slot on your DS. It allows you to download roms of most games online and play them on your DS for free (yes this is illegal). It also is one of the only ways you can get your DS to play other media like music and movies. Basically, if you have a DS, you need to get one.