Just a few months ago we were impressed with Western Digital for cramming an entire terabyte of storage into a mobile hard drive that was just seven millimeters thick. But now Seagate's come along to steal WD's thunder with the ultra-slim 2.5-inch Spinpoint M9T that manages to double that capacity to two-terabytes inside a drive that's just 9.5 millimeters thick.

So you're getting twice the capacity at the cost of just 2.5 millimeters in added thicknessā€”that sounds pretty reasonable. After all, at 9.5 millimeters thick the M9T is still the thinnest two-terabyte hard drive you can currently buy. The drive will also be available in a 1.5 terabyte model as well, which will presumably cost slightly less than the two terabyte model's $129 price tag. [Seagate - Samsung]