I have an original R4DS with a 2GB uSD card and the latest firmware (plays all backups as far as I can tell)....and a DS Extreme 4Gb (512MB)cart for sale. The Extreme isn't that great....needs a folded piece of paper to make it work in a DS (pressure against contacts) and is kinda slow. Doesn't play the latest backups. Can't upgrade the storage capacity. The R4 is great though... Buy 'em both for $10, plus actual shipping. I'm guessing shipping will be a few bucks. Yes, you have to buy them both (or just pretend you are buying the R4, and getting the Extreme for free) greg edited by ddp