Add More Storage for Games
Unlike your smartphone or tablet, the PS4 is ready for you to add more storage.
It’s up to you how you want to make more room for games on your system. Pull the cover on your PS4 off to replace the laptop-sized hard drive inside it with another drive that has more capacity. If opening your console makes you feel uncomfortable, add more storage to your PS4 using an external USB 3.0 hard drive. Gotta Be Mobile’s Best PS4 Hard Drives roundup includes 6 great hard drive options for both upgrade methods.
Remove every file that you have on the hard drive you want to store games on. Your PS4 will erase everything that’s on it.