On the Xbox One X we don't know how the different speed drive are going to be effected. MS has been claiming a 50% increase in load times and I believe the internal HDD on the Xbox One X is a 5200rpm drive..so you would be fine if you have an external at 5200. I personally would try to get a 7200 just to cut back on load times even more...but until MS or a Web Site does a analysis prior to launch we will not know.
Thanks, Hawk. That's great advice.
Are the price discrepancies at this point between a 7200 and a 5200 worth it at this point? Are we talking 3 seconds loading time difference etc?
There are deals all the time on external HDD's.