With U.S. military drop-test standards and an advanced three-stage protection system, the purple Transcend StoreJet 25H3 External Hard Drive keeps your data safe and secure while traveling. Bus powered with the USB 3.0 interface, the StoreJet 25H3 has 4 TB of storage. For backing up your data, the drive comes equipped with a one-touch Auto-backup button. You will also receive the Transcend Elite backup and security software.