Standard Wii ISO files are always 4.37 GB, regardless of how much actual data the game uses. WBFS "scrubs" or strips out the empty "padding" data, significantly reducing file sizes. For example, a game that only contains 200 MB of data will only take up ~200 MB as a .wbfs file.
Legal Disclaimer: Downloading copyrighted Wii games from public archives is illegal in most jurisdictions unless you own the original disc. This article is for educational purposes regarding format management and public domain/ homebrew archives. Wbfs Archive
Unlike standard PC filesystems (FAT32, NTFS, exFAT), WBFS was designed for a single, brutalist purpose: to store raw Wii game dumps (ISOs) on a USB hard drive without wasting a single byte. Standard Wii ISO files are always 4
A standard Wii disc image (ISO) is exactly 4.37 GB, regardless of how much data is actually on the disc. WBFS "scrubs" the empty padding, meaning a game like Kirby’s Epic Yarn might only take up 1.6 GB instead of 4 GB+. Ease of Use: Unlike complex ISO formats, files are plug-and-play with modern Wii homebrew apps. Hardware Longevity: A standard Wii disc image (ISO) is exactly 4