From Press Release:
As November 5 quickly approaches, we have a few things for Call of Duty: Vanguard to share today, including preload and file size info, as well as a “Music Behind the Scenes” video.
Vanguard’s install size at launch will be significantly below previous Call of Duty releases, with new on-demand texture streaming tech expected to save up to 30-50% on next-gen console and PC hard drive disk space.
Preload and File Size information can be found at the Call of Duty blog post: https://www.callofduty.com/