Excerpt: I own a few of these and replaced my larger hard drives with them. They take up very little space and you don't need an AC adapter- they run off USB. I bought another slim portable hard drive brand initially, but found the Seagates were smaller so switched to them.
Summary: This is a good external drive for my ASUS tablet (slate). It receives its power from the USB port so I do not need an additional power cord. I have it set to back up my files whenever it is connected to the tablet. I only wish that it was Bluetooth so the USB cable could be eliminated. However, that would mean it would have to be battery operated and I'm not sure how well that would work.