Wonktonodi on 01 December 2015
Ps4 don't currently support external hard drives. Though you can replace the internal hard drive.
All physical games you buy will still be installed on the hard drive, though it's usually pretty fast, you can also easily delete games later (without deleting saved data for the game)
If you plan on getting playstation plus and keeping it for several years, you might want to get a larger internal hard drive. If not, then you might be fine with what you have.
