I have a drive that works fine with USB Loader GX on one Wii but always give the 'Waiting for your slow USB drive' error message on another and fails to mount. As all things seem identical I figured there may be an issue with how the USB port is powered on that Wii. After trying every combination of the USB ports and both or just one of the USB leads for power I tried putting a small pen drive in the other USB port while the HD was attached to the main one. The WBFS drive mounted instantly first time. I have tried this with a combination of pen drives formatted with NTFS and FAT and also a Bluetooth USB adapter and as long as one of these devices is in the other USB port, USB Loader GX loads the WBFS hard drive in the first USB slot perfectly every time. It seems like it just requires a USB device in that second port for this to work even though that device is not actually being used. Hope this information helps someone.