I brought Seagate Expansion STBX2000401 2TB 2.5-Inch USB 3.0 Portable External Hard Drive in 2 year before.
Price of Seagate external and internal hard drive are quite high comparatively others in the market, but I thing it's worth the price because it's awesome performance and longevity. I found some advantageous points of this product, so I like to suggest you if you are finding a long lusting and heavy duty external hard drive then this is the perfect choice for you.
I used this external hard drive as the main secondary storage of my computer. So, I keep it connected to my computer all the time but the rise in temperature of hard disk takes place very moderately. It's build with USB 3.0. So the transfer rate to or from the hard disk is very high.It comes with an additional warranty of 3 years.
