WBFS is an acronym that stands for Wii Backup File System. It is a system that creates partition on a hard drive or a USB in such a manner that you can store your Wii game titles in this partition with the help of an application. You cannot ordinarily create such a partition but with the help of WBFS managers, storing your Wii games on external hard drives becomes easy. You can download WBFS manager 4 0 64 bit here for free and have some extra storage space for your Wii games. Convert between WBFS, CISO, and ISO files after installing this manager.