According to Reddit, installing the new firmware allows your PS4 to detect up to 4TB hard drives properly. There’s just one minor issue with this support for more storage: there’s currently no 4TB drives using the 2.5-inch form factor that fit inside the PS4. The internal drive can be no more than 9.5mm thick, so while 4TB 2.5-inch hard drives do exist, they are 15mm thick. So you can’t buy a 4TB drive that will fit inside the standard PS4 case (yet).
Such a limitation isn’t going to stop PS4 owners hooking up a 4TB 3.5-inch drive, though. As long as a connection is made between the PS4 and the drive you can do what you like with the drive. Put it in an enclosure, place the bare drive next to your PS4, or invest in a Nyko Data Bank if you want a clean, although bulky setup.
Sony released a video showing off some of the other features firmware 3.50 introduces, but there’s no mention of the 4TB drive support.
Check out all of the new features in system software 3.50 – including PC and Mac Remote Play, scheduled events, appear offline and lots more…
