i think the main problem is fake card. It's not microsdhc. I use a Supercard since last winter for my Ds, i neve have problem with. Now i m trying to use ndsttigold, but the performance is very slow, so i thinked it was my 4gb flash cart. So i copied all from my 4gb on supercard to a supposed slow Kingston (very slow on dstti card), after that i used the slow 4gb in my supercard and it's the same great speed. So now i think the main problem it's fake card Am i alone to think like this ?