Call of Duty: Black Ops 4 is going to take a healthy chunk of hard drive space when it installs from the disc, but you'll need to keep some space open for the day-one patch as well. Depending on your console of choice, you should have as much as 112 GB of free space to complete the installation.

According to Activision's support page, the day-one update has a download size of 50 GB, and when it's all done the game will leave a 55 GB footprint on your PlayStation 4 or Xbox One. On PlayStation 4 you'll need to have more room set aside, though, as it states that for an "optimized download experience" you'll want 112 GB of free hard drive space. This is just the size needed to complete the installation, though, and once the process is complete it will go back down to the 55 GB requirement.

The update seems to be adding necessary components for the multiplayer modes, including Zombies, Specialist Headquarters, and the new Battle Royale mode Blackout. The notes mention that Blackout will be playable once the installation reaches around 30% on both consoles. On PlayStation 4, make sure you select "Update to Latest Version" when the prompt appears to be able to access Blackout during the installation.

Each of those notes goes for the disc-based copies that require a separate day-one install. If you buy it digitally, that copy will be 55 GB in itself, without any additional patch required. Check out our pre-order guide for more details.