https://wccftech.com/cod-black-ops-4-50gb-day-one-patch/

Hoping to save yourself some download time by buying a physical copy of Call of Duty: Black Ops 4? Well, you probably shouldn’t bother, because the disc-based version of Black Ops 4 requires a huge 50GB day one update. The download version of Black Ops 4 is only slightly larger, around 55GB, so yeah, depending on your Internet speed, buying physical will save you maybe…10 to 30 minutes? Not really worth the drive to the game store.

Here are a few more details about the Call of Duty: Black Ops 4 day one update courtesy of Activision support: