USB Loader GX uses the Wii’s USB host controller through libogc and the IOS/module stack provided by the Wii homebrew environment. It relies on the FAT32 filesystem (and sometimes NTFS/exFAT via cIOS or plugins), proper partition alignment, and low-level USB mass storage support in the cIOS (custom IOS) installed on the Wii. Because the Wii hardware and software layer are limited, some drives that work on PCs fail on the Wii.
If you’re diving into the world of Wii homebrew, you’ve almost certainly heard of . It’s one of the most polished, feature-rich loaders available. But there’s one question that pops up in every forum, Reddit thread, and Discord server: usb loader gx usb compatibility list
The following devices are frequently cited in community reviews and lists as having high success rates: USB Loader GX uses the Wii’s USB host
While there is no single "official" list that is perfectly up-to-date, community consensus from the Wii Hacks Guide and SourceForge Wiki identifies these general rules: If you’re diving into the world of Wii
Seagate (post-2020), LaCie, ADATA, and any USB 3.2 Gen 2 drive.