USB3 can be added to a pc by adding a card which fits in a PCI slot. You would need to buy USB3 peripherals to gain any benefit (and don't expect a 10x improvement).
Have you considered adding a second harddrive internally to use for your backup?
iPhone X review
Political cartoons in 2017: Chris Riddell, Rebecca Hendin and Dave Brown on what it’s like to…
The best iPhone for 2017
Tennis : comment regarder la finale de la Coupe Davis 2017 ?