The old version will be deleted, which frees up some space again, but you need that extra space free in the first place. For example, if you have 30GB free and a 2GB patch for Call of Duty: Warzone arrives, you won't be able to download it until you make some extra room - enough to technically install Warzone twice on your hard drive. In other words, your PS4 needs around double the storage space for a game in order to download and update it. When you download an update, your PS4 then makes a second copy of the game file, adds the update, installs this new version of the game, then removes the outdated version. The reason you can't download and install the update is because of the aforementioned copying procedure. Let's say you're trying to download a patch for Call of Duty: Modern Warfare and your PS4 says there's not enough room, even though there should be. Downloading a game plus any patches will require more space than it might first appear. This can seriously inflate the game's file size beyond what's advertised on PlayStation Store pages. The problem is that, whenever your PS4 downloads a game, it's also downloading all the updates to ensure you're getting the most recent version. You try to set it to download, only for your PS4 to tell you there's not enough space. Let's also say you know that your hard drive happens to have 150GB of space free, meaning you should be able to install the game with no issues.

Say you've just bought Red Dead Redemption 2, a game that takes up a minimum of 105GB according to PlayStation Store. Let's use an example to explain what's happening.

Why is it doing this? Well, it all ties into that lengthy copying process your PS4 goes through whenever you install a game or update. Sometimes, your PS4 will refuse to complete a download, even when it looks like you should have plenty of space left on your hard drive.

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