With the rollout of PS4 System Software Update 4.50 (code named Sasuke), Sony is adding support for external hard drives. The internal drive can still be upgraded if you so wish, but once Update 4.50 is installed it will be possible to plug in a USB 3.0 external drive of up to 8TB.
Once connected, a PS4 will automatically recognize the new drive and allow you to start saving files and applications to it directly. It's also possible to manage the storage from the settings menu and decide where data goes
Life..... It's just a game