PS4pro supports SATA 3.0

[Pemalite]

Intrinsic said:

Why this matters is cause this on the hardware side of things will amount to a literal halving+ in loading times. So anything that needs to be loaded from the internal HDD will happen much much much (and noticeably) faster.

It really doesn't halve load times.
It is limited by the Mechanical Hard Disk Drives transfer rate, most will hover around 120MB/s these days, perhaps tank to 20MB/s during excessive random reads and writes.
I highly doubt a large % of console users even bother to upgrade their antiquated 5400rpm drives anyway.

vivster said:

Radek said:

You can buy Samsung 850 Evo 500GB for around 150$ / € and many people do.
Might seem like a lot, but I'd buy one and install in my PS4, except it has SATA II so there's no point.

The speed difference from an SSD comes mostly from its random access speed and not sequential read. That means that even on SATA2 an SSD is unbelievably faster than any HDD. Unless the game is constantly loading huge files, there will not be a lot of diffrence in overall time savings between SATA 2 and 3. The difference to HDDs will always be huge though.

This. Random Reads/Writes aka. Minimal latency in accessing data is the real strength of an SSD.

This is why SSD's  even if it has lower transfer rates than a Mechanical drive will always feel faster than a Mechanical drive.

Mechanical drives though will see no difference unless it's a a Burst transfer.

Intrinsic said:

Idk, but this much is certian. In situations where you sre looking at a load sfreen in game whivh lasts for however lomg said screen lasts, you will see improvements with the right kimda drive.

The right kind of drive pretty much excludes all mechanical drives.
A large portion of TLC NAND SSD's will probably not see much improvement either... Drives like the Samsung 750 EVO, 850 EVO, Intel 540, Crucial BX100 and others don't push Sata 2 very hard, let alone Sata 3, not in sustained transfer rates anyway.

When it comes to consoles, the few seconds you save on load times by going to an SSD is really not important in my opinion... You are better off getting the largest mechanical drive you can get so you can actually have a sizable amount of games installed.

Let's not forget that for Multiplayer games... Everyone will load at the same pace as the slowest player in most instances.

numberwang said:
External HDD is USB3? Can you run games from the external HDD?

On the Xbox One you can. And it works amazingly well.