These are mandatory. Without them, the game won't run.
These include things like localized voiceovers (e.g., German, Japanese, or French audio), 4K video textures, and soundtracks. fg-optional-soundtrack.bin
By making the soundtrack optional, the repacker can shave several hundred megabytes—or even gigabytes—off the total download size for users who only care about playing the game. How to Use the File These are mandatory
The file is a testament to the granular control offered by the repacking community. It’s a space-saving feature designed for the modern era of massive 100GB+ game installs. If you're a fan of game scores, keep it. If you're low on space, it's the first thing you can leave behind. These are mandatory. Without them