You are likely trying to use a drive formatted as WBFS. Switch to FAT32. Modern USB Loaders (2020+) work better with FAT32 where WBFS files are just regular files. Format your USB as FAT32 (using guiformat for drives over 32GB).
: The most popular interface for launching games on the Wii.
Your own disc collection. Public domain dump sites do not exist for commercial Wii games.
You are likely trying to use a drive formatted as WBFS. Switch to FAT32. Modern USB Loaders (2020+) work better with FAT32 where WBFS files are just regular files. Format your USB as FAT32 (using guiformat for drives over 32GB).
: The most popular interface for launching games on the Wii.
Your own disc collection. Public domain dump sites do not exist for commercial Wii games.