StoreJet 35 Hard Drive is the ultimate way to add an extra SATA hard drive to your computer for downloading, storing, transferring and backing up your data. With both eSATA and USB 2.0 connection options, the StoreJet 35 Ultra guarantees both speed and compatibility. While most 3.5-inch external hard drives are prone to data-loss and drive failure due to overheating, Transcend's StoreJet 35 Ultra features an efficient active cooling system that includes a silent 80mm high-flow fan to keep your drive running cool and stable. The StoreJet 35 Ultra not only makes external storage easier, but also more productive with its bundled StoreJet elite software that offers intelligent backup scheduling, security, and file compression functions. Transcend's StoreJet 35 Ultra supports all commonly used operating systems. The StoreJet 35 Ultra is the perfect portable data storage solution to help you effectively mobilize your digital world.