^^ Seagate HDD are slow and unreliable these days. One of my 2 TB internal drive has errors being reported by SMART. The internal desktop series drives are not worth buying at all.
An external 2 TB USB 3 drive that I bought has a very slow drive, but also works only with USB 2.0 and not USB 3.0.
I got another 5TB seagate external drive from US last year and its works great when I tested it, but as one of the AC adapters fried, I could use only one of the two drives till I find a replacement adapter.
I am using a WD Red 4 TB as an internal drive (all my games are installed on it) right now and they are not bad at all for the price. The Blacks off course make sense for performance, but if you want reliability. WD enterprise series make more sense.