Right. I used to have this happen to me on my Family Wii on USB Loader GX; I have a 4TB Seagate External Hard Drive. This isn't an error, what happens is that USB Loader will try and load off the Backup partition on the Hard Drive (190MB, or...
@Xdqwerty I remember getting a Genesis for Xmas, when I was your age, 13-14. Some cool games and good memories. Metal Gear, and Sonic were the games I played the most on it.