The "USB device not initialized" error in USB Loader GX is a common hurdle for Wii homebrew enthusiasts, often caused by incorrect drive formatting, improper port usage, or outdated custom IOS (cIOS) files. Quick Fixes and Hardware Checks
On the original Wii, this is the USB port closest to the outer edge of the console (when lying flat). wii usb loader gx usb device not initialized repack
Completely shut down your Wii (red power LED, not yellow/standby). Some users report success by unplugging and re-plugging the drive during the 20-second initialization countdown when launching the loader. The "USB device not initialized" error in USB
External 2.5" hard drives in cheap enclosures may lack sufficient power. A USB Y-cable can provide additional power from the second port. Formatting for Maximum Compatibility often caused by incorrect drive formatting