Forza Motorsport 7 stands at around 100 GB

[Chris Hu]

I'm guessing that is with the 4K update for the XBox One X. That is more then twice as much as Forza Motorsports 6 which is just under 50GB. The game is shaping up to be great though a little over 700 cars, dynamic weather (hopefully usable on most tracks) and 32 different locations.