In the emulation and console modding scene, a is a game file that has been reduced in size using advanced algorithms (like WinRAR, 7-Zip, or specialized tools like Wii Backup Manager’s compression).

Transfer the WBFS file to a folder named wbfs on your USB drive or SD card.

: "Highly compressed" files from unofficial sources can sometimes lead to corrupted data or infinite loading screens.

Compression tools remove redundant data, fillers (dummy files used to push game data to the outer edge of a physical disc for faster reading), and repackage audio/video streams more efficiently. When you extract the file, it reconstructs the full ISO.