OK, i have 2 external HD's which i have tried using with USB loader and 2 games. One game is a .iso file and the other a .ciso file. I put both of these games onto both of the HDs (using wii backup manager both formatted to WBFS, although i also tried FAT32 with the same results). HD A will happily load both of the files. HD B will only load the compressed .ciso file. When i try to load the iso the loader just hangs on the black screen before the wrist-strap disclaimer. If i convert the .iso to a .ciso it will load perfectly on HD B. Anyone got any bright ideas about why it is unable to load a .iso but will load .ciso files?