Hitachi 7K500 500GB SATA 2 Hard Drive
 

Snip: One thing that is common among people that collect songs on their
computer or movies is that at some point they will evidentially run out of
drive space using the drive that came installed on their computer. Hitachi
has now made it possible for this point to be reached a lot farther down the
road thanks to their 500 GB hard drive. The Hitachi 7K500 is not only one
of the largest drives available to the public it is also one of the fastest
thanks to the SATA 2 technology with speeds up to 3.0Gb/s.

Link: http://hi-techreviews.com/reviews/7K500/hitachi.html