Spiral Insanity
Banned
This is what I and many others have for a 2TB HDD: https://www.amazon.com/Seagate-Backup-Portable-External-STDR2000100/dp/B00FRHTSK4/ref=sr_1_1?s=pc&ie=UTF8&qid=1478135773&sr=1-1&keywords=seagate+2tb
Also, here is a guide for swapping out PS4 HDD's and even setting your old drive up (which you can put in the shell of the one you bought) to use on PC!
http://imgur.com/a/JF5jA
Oops, reminds me that I already bought a 2TB for my current PS4.. I guess I will need to buy it again if I want to use the official transfer method.
Will the Pro support 4TB at all?
So if I have PS Plus then my saves are in the cloud right...no need to migrate anything?
They should be, but I advise you to double check the games you really care about. A year ago PS Plus save space was limited so many games stopped auto uploading when your storage was full.