Sorry for posting this topic if it's been already said but I couldn't find the info I was looking for. So, I was wondering which M3 cart fit the old ds perfectly? I think the mini-SD is the one that fit but maybe they both do? Also I'm looking for a good online store that sells SD cards at low prices(Mini or Normal depending on the cart). It must ship in canada too so a canadian site would be prefered. And finally, what speed should the card speed be? Thanks for your time and happy gaming time. Edit: Now I'm also considering the supercard products. The same requirements apply.