Activision has stated that a unit of 500GB PS4 model may not be able to keep Call of Duty: Warzone and Call of Duty: Black Ops Cold War anymore.
The statement was made on the Call of Duty blog, the part about the 500GB version of PS4 is as follows:
“Those who own a standard PlayStation 4 with a default hard drive of 500 GB may need to make room if they have the full versions of Modern Warfare®/Warzone and Black Ops Cold War with all modes and packs installed.”
“Should you have both games installed and have kept up to date with updates, you may need to delete some unused Game Content to have a successful download and install of the Warzone patch tonight.”
The new update for Warzone and Black Ops Cold War introduces a new mode: Outbreak. It’s a mod where the players(up to four) survive against zombie hordes in a warzone-size map. You can loot like you are in Warzone and more similarities between the two game modes are present.