Desktop-class performance. These fast & efficient hard drives with 7200 RPM spin speed, 16 MB cache, & SATA 3 Gb/s interface are sure to satisfy even the most demanding notebook users. Low power consumption. With 5400 RPM-equivalent power consumption there is no compromise in battery life. Did you know... Its easy to install an internal hard drive in your computer. Advanced Format (AF) Technology being adopted by WD & other drive manufacturers as one of multiple ways to continue growing hard drive capacities. AF is a more efficient media format that enables increased areal densities. (BPKT models only) Reliable & rugged.WDs Shock Guard technology protects the drive mechanics & platter surfaces from shocks. WDs Secure Park parks the recording heads off the disk surface during spin up, spin down, & when the drive is off. This ensures the recording head never touches the disk surface resulting in enhanced long term reliability due to less head wear, & enhanced non-operational shock tolerance. Tested for compatibility. We perform tests on hundreds of systems & a multitude of platforms in our FIT Lab & Mobile Compatibility Lab to give WD customers confidence that our drives will work in their systems. Quiet. In a notebook drive, silence is golden. WDs exclusive Whisper Drive combines state-of-the-art seeking algorithms to yield one of the quietest 2.5-inch hard drives on the market. Ideal for: Portable digital devices of all kinds including notebook computers, external storage, & digital media players.