wd black 5tb

i was thinking of buying 1 of these drives for my pc gaming and i cant work out which is best as most reviews are so mixed on the net its hard to get a handle on it lol, some say the black isn't good because its not 7200rpm? WD 5 TB My Passport Portable Hard Drive WD_BLACK P10 5TB Game Drive

some say it is and some say its got super slow write speeds etc, so i have no idea lol as i thought black drives were made for gaming in mind so it cant be that bad! was going to buy 2, 1 for my xbox1 console and another for my pc as my steam gaming drive or would it be better having internal...