One of our readers asked us to look at the Seagate Barracuda ST5000DM000 5TB 3.5-inch internal desktop hard drive as he bought one off of Amazon and was having some performance issues with the drive. We looked into it and discovered that Seagate does not sell an internal 3.5-inch desktop drive on the market. That is strange as we went over to Amazon and found half a dozen retailers selling this particular drive. We got our hands on one of these 5TB drives and tried it out to see what was going on!