Seagate’s FireCuda is our favorite PS4 internal replacement drive, mostly thanks to its built-in 8GB of flash storage that can speed up loading times, and you can get the 2TB model for just $80 today. It normally bounces between $85 and $95, and rarely drops this low.
Even if you don’t feel like cracking open your PS4, you could pop this into an inexpensive enclosure like this one, and use it as an external drive with your PS4, or anything else.