Wii Rom Highly Compressed ((top)) -

This is the most common and legitimate form of compression. A standard Wii game disc is filled with "garbage data"—random padding used to fill the empty space on the disc so the data spins at the correct speed for the laser to read it.

| Game Type | Original ISO Size | Typical WBFS Size | Highly Compressed (7z) | | :--- | :--- | :--- | :--- | | Small / Low-asset (e.g., Wii Sports) | 4.37 GB | 130 – 300 MB | 80 – 150 MB | | Medium (e.g., Mario Kart Wii) | 4.37 GB | 3.2 GB | 1.8 – 2.2 GB | | Large / Dual-layer (e.g., Brawl, MP Trilogy) | 8.5 GB | 7.9 GB | 4.5 – 5.5 GB | wii rom highly compressed