WBFS files are "scrubbed," meaning they remove empty data from the disc to save space, making them much smaller than standard ISO files. If you'd like, I can help you: Find the exact steps to use Wii Backup Manager. Troubleshoot why your Wii isn't seeing your USB drive. Find a specific game title you're looking for.
While direct Google Drive links are unstable, you can find more reliable sources through these community hubs: wii wbfs games collection google drive