This WD 320GB laptop hard drive lets you upgrade or replace the HDD in your notebook. This 7200RPM SATA 2.5" model from Western Digital's Scorpio Black line is Built with 320GB of storage space for all of your important data and programs. With a 16MB cache, to minimize time wasted on redundant data, and SATA II 3.0Gbps speeds, you'll get a fantastic rate of transfer for the smoothest computing experience. Sized for any 2.5" drive slot, this device will make an effective upgrade for a Playstation 3 or XBox 360 drive as well. Western Digital 320GB Scorpio Black 2.5" Internal SATA Hard Drive - 16MB Buffer
The WD3200BEKT hard drive from Western Digital features 320GB of storage size in a 2.5" form factor. This drive connects to your system via the SATA 3 Gb/s interface so make sure you have an available port on your compatible motherboard. Advanced features of this HDD include a 16MB cache/buffer and 7200 rotational spin rate.