Designed for optimal performance & high durability, the Toshiba MKxx 61GSYN series of 7, 200 RPM hard disk drives deliver 160 to 640GB* of storage capacity in the 2.5-inch form factor. Key Features Optimal performance at 7200rpm Serial ATA connectivity 16MB cache buffer Power-efficient The MKxx 61GSYN family of Serial ATA drives offers extreme power efficiency & superior operating acoustics over 3.5-inch drives for today&8217;s high-end notebook PCs, gaming laptops, & mobile workstations as well as Energy Star all-in-one & slimline desktop PCs. Toshiba couples greater power efficiency of the MKxx 61GSYN drives with other environmentally-conscious solutions including Ro HS-compliance & utilization of components that reduce PVC (polyvinyl chloride) & BFRs (brominated flame retardants) as well as meet halogen-free** standards. An optional free-fall sensor responds to drop events & securely locks the recording heads in place off the media before system impact. This provides an additional level of ruggedness & durability to the MKxx 61GSYN drives & is particularly suitable for mobile applications.