I've been using my R4 just fine for almost two years now, so I decided to switch from 2GB to 8GB. I read it works up to 32GB, but when I tried the 8GB card, it's stuck at the Loading... screen. I retried the firmware, but still didn't work. The R4 isn't a clone, since it's worked fine with my 2GB SD card (and still does). Is the SD Card busted? Does the R4 not run on 8GB? What am I doing wrong?