Seagate FireCuda 2TB | $65 | Amazon
Seagate’s FireCuda is one of the most popular PS4 replacement hard drives out there, 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 $65 today, the best price ever with the exception of Prime Day, when it was $60.
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 over USB.