I just got my JagSD cart today an I'm very excited however it is not working for me. When I tried to load any .jag ROMS it would get stuck at the loading ROM screen. I had to shut off my Jag and when I power it back on it just says loading Reading directory and does nothing. I have tried multiple .jag ROMS and they all get stuck at the loading ROM screen. I tried 2 different brands of microsd. I was able to upgrade to the latest firmware.
I have since tried a 3rd SD card that is 8GB. I got a stub error now and then whenever I tried to bootup the JagSD it sits at Reading directory.
I tried a 4th SDcard and it's still not working, it's a 16GB Kingston. I tried .ROM/.BIN demo files and the Bad Apple SD demo and it's getting stuck at loading ROM. I would have to power it off.