Go into system options and tell us the firmware version, it's on the bottom right of the top screen, mine says "Ver 1.4U". If your's is the same as mine, the only a select few flash cards work because of a firmware block. I have an Acekard 2i and it's been very good to me. If you don't have the latest firmware (1.4U) don't get it yet, you want to buy what ever flash card you're going to get first, then make it work with the 1.4 firmware. Not much I can't tell you other then that, except welcome GBAtemp!