HDD space needed
Your PS4 needs twice as much HDD space as the size of the game. For example a 14GB game can only be downloaded to a PS4 with 28GB of free space on the hard disk drive.
If you have pre-ordered, make sure that you have enough free space three days before release date to ensure pre-load or auto-download works. If you have automatic download switched on your PlayStation 4 system will download the game during the first download window (04:00 – 06:00 AM) after pre-load is released. You can also manually start your pre-order download when the pre-load file becomes available. Pre-load isn’t always available but is usually made available between 48 and 12 hours before release.