Compatible with Wii and GameCube titles, as well as homebrew applications and WiiWare.
USB Loader GX is a graphical, open-source USB loader for the Nintendo Wii. It is designed to load Wii and GameCube games from a USB drive (HDD or flash drive) or SD card. usb loader gx wiibrew
Recent 2023 updates added full support for playing games off SDHC cards, removing the historical requirement for a dedicated USB drive. Compatible with Wii and GameCube titles, as well