This is the DS-Xtreme DS cartridge to play your legal backups and stuff.
It requires no modding, no flashing, no anything. Just stick the cart in and go. It has an integrated female mini-USB connection to plug into a computer and drag your *.nds files onto it. I've had a 90% success rate with it.
The label says 4Gb, but that is gigabits and therefore close to 512mb.
Here's a review: REVIEW: DS-Xtreme homebrew solution for Nintendo DS | Mobile Magazine
$40 shipped.
It requires no modding, no flashing, no anything. Just stick the cart in and go. It has an integrated female mini-USB connection to plug into a computer and drag your *.nds files onto it. I've had a 90% success rate with it.
The label says 4Gb, but that is gigabits and therefore close to 512mb.
Here's a review: REVIEW: DS-Xtreme homebrew solution for Nintendo DS | Mobile Magazine
$40 shipped.