This drive works flawlessly with timemachine which is great. But there are two things dissapoint me about this drive. The light and the noise. One of the previous reviewers said the light is only on when the drive is accessing. Not true with my drive. It's as if it has a small torch inside with no option to dim it or turn it off.
One of the thing I used to love about about my mac was that it was silent. With this drive plugged in that is gone. There is a constant drone from the Seagate drive similar to the noise from a PC.... even with time machine turned off.
I'm a week into using it and I tend to leave it unplugged because of these things making it pretty much useless to me. If your happy for an external hard drive to be mix between a night light and small noisy fan then get one of these. If not. Steer clear. .
If I could return it I would.