I've had supercard sds in the past and bought one for a friend. The old ones used to show up no sd in slot when no sd was put in the slot. These seem to either give a white screen or just boot up to the ds menu when no sd is inserted. The supercard sd is an original one and works fine with an sd card in the slot. This is the second one as the last one had a faulty sd slot when it arrived, so I had to get it replaced. A few other people have been complaining about faulty supercards as well. Them changing them a little may be the reason, cheaper chips maybe?