I had this same problem with the usb drive so I was required to copy only the wii64 files from the root of the drive (not the files from the apps folder) onto an SD card so you should have a location such as (sdcard)\wii64\roms and (sdcard)\wii64\saves but the first is where your roms should be. still watch out for corrupt ROM files.by Thewiikilledmii - Getting Started