| Format | Compression Ratio | Android Compatibility | Speed | | :--- | :--- | :--- | :--- | | | 0% (Raw) | Perfect | Fastest | | .CSO | 40-50% | Perfect (Native) | Slightly slower loading | | .CHD | 60-80% | Perfect (via AetherSX2) | Same as ISO | | .7z / .RAR | 80-90% | Not playable (must extract) | N/A |

format that preserves all original data while drastically reducing size. CSO (Compressed ISO)

Set the Internal Resolution to 1x Native . Only increase it to 2x or 3x if your frame rate remains perfectly stable.

Thanks to modern Android emulation, you can now play PS2 games on your phone. However, there is one massive problem: A standard PS2 ISO ranges from 1GB to 8GB. Most phones don't have 300GB of free space for 50 games.