WBFS ( Wii Backup File System) is a file system used to store Wii games on a hard drive or other storage device. WBFS games are essentially backups of Wii games that can be played on the Wii console using a homebrew application.
Some public domain / homebrew Wii games are available as WBFS. For commercial games: download wii wbfs games portable
Once your games are converted and organized on your portable drive, you can play them on various devices: WBFS ( Wii Backup File System) is a