It's a high capacity traditional hard drive, mostly for photo storage etc. This particular drive was very highly rated for reliability about 4 years ago, and I have used a 2TB version since without trouble. This drive is a descendent of drives from the old IBM stable, of course, even though it is many years since IBM sold its consumer drive business to Hitachi. This was then sold on to Western Digital in 2011. Under pressure from the EU and the Japanese competition watchdog, Western Digital was forced to sell off the 3.5-inch Hitachi division to Toshiba. But the reliability figures showed some of that heritage had rubbed off. Let's hope that's still the case.