These include language packs (like fg-optional-arabic.bin ), 4K textures, or bonus soundtracks.

If you’re unsure about its purpose:

: Some third-party game updates may require all optional files to be present for a successful hash check before applying a patch. Common Issues and Troubleshooting

Scrolling through Arabic text is smooth without the file, but stutters when the file is loaded. Cause: The system is misconfigured to use the optional binary for every character instead of only for static text. Fix: