I just got my Super SD System 3 today from Stone Age Gamer. Hucard games run fine, but I get a "Load Error!" message whenever I try to boot a CD game. I figured that maybe it needed a firmware update. I got the 7-digit serial number from the bottom of the device and tried to register it in the downloads section of the Terraonion site. It says that the serial number cannot be found.
I don't really care about registering the device, but I just want it to work when booting CD games.
I have an unmodded US Turbografx-16 with original power supply. I am using a Sandisk 32GB microSD card. I am using an HD Retrovision cable, but there are no graphical issues. I made sure the in-game trigger is disabled. My BIOS file name is "[BIOS] TurboGrafx CD Super System Card (USA) (v3.0).pce".