As reported by IGN, players with early access to the game's single-player campaign found that the total file size for Call of Duty at installation which also includes the Modern Warfare II campaign, Warzone, and Call of Duty HQ now comes in at 234.9GB on PlayStation 5.
The increased file size was "due to the increased amount of content" at launch, including map files for Warzone, as well as the Zombies mode, and the fact that a lot of content from Modern Warfare II carries over to Modern Warfare III.