I have been using external HDD's for a couple of decades now but... this one flummoxed me for a minute. I used to work in a production environment where the drive would be semi-stationary and the computer would be changed out occasionally. You would dismount the drive from the computer but the HDD would stay on. Plug in a new computer and away you go... So every external I have used would power up when you turned it on, plugged in or not. Not this thing. I chose the right power plug adapter, slid it on, and plugged in the drive. And nothing. Couldn't figure it out. Dead as a doornail. Seagate doesn't manufacture sketchy-ass stuff, so what's the deal? What finally clued me in was that thing did not have a power button. What the f? What turned it on or off? Ohhhh, maybe the data cable has to be plugged in? I was reluctant to try this because to integrate it into the morass that my external peripheral situation would have been very aggravating if that wasn't it. Finally I remembered that I had a Macbook Pro that I don't use very often, and maybe I could test it with that. Sure enough, plugged it in and it worked like a champ. There is no mention of this, anywhere in the documentation, however, which would have been nice. May update this with real-life results, but I'm not too worried at this point.
Rating: [4 of 5 Stars!]