The file fg-optional-4K-videos-3.bin is a compressed data archive containing ultra-high-definition (4K) video assets for a specific game. In large repacks, 4K cutscenes are often split into multiple parts (e.g., part 1, 2, 3) to facilitate easier downloading or to keep individual file sizes within certain limits. "Optional" vs. "Selective"

This is a classic problem. You launch setup.exe , and the installer immediately stops, saying something like: "Installer needs the next part (.BIN) file" or "Cannot find fg-optional-4K-videos-3.bin".

fg-optional-4K-videos-3.bin – Optional 4K video pack (part 3/5)