It supports the latest usb, and Linus did a video recently where everyone thought a sata SSD was the fastest for gaming so I wouldn't sweat that fella.
It'll probably be much cheaper to buy a 2tb usb 3 SSD tbh.
I'll also say this now before I get accused of being some sort of console worshipper. I just like gaming. Always have always will and I'll now do it on whatever platform I can that offers me those games.
I just feel that the next gen consoles will totally catch up to PCs. Or at least gaming pcs in their hobbled console state where they've pretty much been since the launch of the original Xbox.