So Sony just announced a $89.99 , 2TB Official PS4 External Seagate Hard drive, from Playstation Blog and dualshockers, too bad it's not an external ssd:
According to Sony, this new “Game Drive” features 2TB of storage and is optimized for any version of PlayStation 4, meaning it’s usable on both the launch, Slim, and Pro versions of the console, so long as it’s running version 4.55 of the system software. On top of that, unlike some external hard drives that work with the console, this one works right out of the box, with no need for formatting. And it even looks similar to your PS4, so it’ll match ascetically.
According to Sony, this new “Game Drive” features 2TB of storage and is optimized for any version of PlayStation 4, meaning it’s usable on both the launch, Slim, and Pro versions of the console, so long as it’s running version 4.55 of the system software. On top of that, unlike some external hard drives that work with the console, this one works right out of the box, with no need for formatting. And it even looks similar to your PS4, so it’ll match ascetically.