Had a 1TB Playstation 4 since 1 week after release about 18 months ago,its no real big deal and its as easy as peasy to swap the hard drive which takes about 2 minutes.
As long as you have the Playstation firmware preloaded on a usb stick even dummies like me can do it ?
And by the way i still think 1TB drives should have been standard for both Microsoft and Sony although thats a cost issue at the time.
And to be honest with all the digital content 1TB is not really enough ?