You can view the status of PS4™ system storage or extended storage and manage saved content. Select (Settings) > [Storage]. [Extended Storage] is displayed when a USB storage device formatted as extended storage is connected to your PS4™ system.
To check how much free space you have, go to the home screen and select Settings > Storage. If you don’t want to delete the existing games in your PS5 console’s storage, you can move them to the extended USB storage.
Open the PlayStation App and select Settings –> Disk Space to see how much disk space is available on your console.
The PlayStation 4 has a massive 500GB internal hard drive, but how much of it can you actually access? After tinkering, it turns out that most of the space is available for games or apps. 407 GB of the 500 GB hard drive is available, saving 93 GB of space for the operating system.
You can identify which one you have by looking at the model number on the back of the device. CUH-10 is the original launch console with 500GB storage. CUH-11 had an updated WiFi transceiver as this could not be fixed by a software update of the previous version. The console had 500GB of storage.
When you try to download a game or even just an update for an already installed game, your PS4 may tell you that there is not enough free space in the system storage. It’s possible that your hard drive is just too full and you’ve legitimately used up all available space.
Deleting Games and Apps
Games probably take up most of the storage space on your PlayStation 4, so to free up storage space you should start deleting games. To see exactly how much space each game is taking up, go to Settings > System Memory Management > Applications.