thanks for the replys
For ordering, i havn't looked many places yet, but http://www.modchip-store.co.uk seems like it stocks what im after and the prices seem cheap enough.(its uk based too)
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You can run DS backups from slot 2 also. You just need a passcard.
I currently have a slot 2 device, but it sticks out the DS, if i want to play DS roms, GBA roms and homebrew, am i better off buying a (new, smaller) slot 2 device with a passcard? (im basicly looking for best all round compatibility, but will sacrafice GBA compatibility for better DS and Homebrew compatibility) (http://www.modchip-store.co.uk/M3-Lite-Micro-Sd-Inc-Passcard-3-p-264.html)
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I have a DS-Xtreme and it is 512MB (4Gb) of space. It holds about 10-12 games. However, Nintendo just kicked up the allowed limit for a game. Future games may take 512MB by themselves or even a Gig.
Thats the main reason i was put off buying a DS-X, no expandability.