Flash drives are highly discouraged by the modding community due to inconsistent controller chips. While 32GB and 64GB drives occasionally succeed, 128GB or larger variations frequently trigger initialization timeouts.
USB Loader GX is compatible with the following Wii console models: usb loader gx compatibility list
Most Wii games are 100% compatible, but certain titles require specific configurations or "Custom IOS" (cIOS) settings to function. Flash drives are highly discouraged by the modding