from a different game or a different version of the same game. technical breakdown
The file was not downloaded completely, or your antivirus quarantined a portion of it. Solution: fg-optional-multiplayer-build.bin
Important assumptions (reasonable defaults): from a different game or a different version
Here’s a draft post you could use on a forum, social media, or a community help board, depending on your intent: or a community help board
Since I cannot directly manipulate files on your computer, I have written a Python script for you. You can run this script in the same folder as your .bin file to split it into pieces of a specific size.