A:Answer NO! This will NOT work on a PS4, I am sitting in front of my PS4 now trying it and it will not accept it because it has a HUB, you want the version without a HUB!
You will get an Error message that says it will not work, then you will be given a list of HDD requirements for it to work, which this drive meets, except for the Hub.
I tried it plugging in and letting it do it's thing and I tried reformatting before plug in, neither work. Get the one WITHOUT the HUB.
On Sony's website I believe the fine print mentions this too, which sucks, plus they have a disclaimer that not all hdd will work. Sucks after Spending so much.