Hello, I have a gba sp shell clone that when I press A or B while turning it on gives me Ingenic jz4750. Figured it would be wise to backup stock firmware to look at it (it only plays mp3's and gba games), and to make sure that nothing goes wrong when I mess around with the firmware that is on it. No it does not have an SD card slot anywhere, in case you are asking why not flash to an sd card.