Place the game file inside that subfolder and rename it to match the GameID: RMGE01.wbfs Legal & Safety Considerations
If you want legal alternatives or safe ways to enjoy Wii games, here are options: wii games roms wbfs free
Use Wii Backup Manager to convert your ISO library to compressed WBFS files. Store them on a 1TB external drive. You now have a permanent, free-to-use (you already bought the games) digital archive. Place the game file inside that subfolder and