[. . . ] The GoFlexTM Desk external drive delivers high-capacity storage and automatic, continuous backup with encryption for all your files with its preloaded software. [. . . ] As the world's most upgradable external desktop drive, you now have the ability to upgrade your connection interface to suit your needs. Plus, the option to place the drive vertically or horizontally complements any desktop. Use the standard USB 2. 0 interface or upgrade to USB 3. 0 or FireWire® 800 by pairing the drive with the appropriate GoFlex upgrade adapter to instantly increase file transfer performance by up to 10x. With the included NTFS driver for Mac®, you can now interchangeably store and access files from PC and Mac computers without reformatting. In addition, some of the listed capacity is used for formatting and other functions and will not be available for data storage. The export or re-export of hardware or software containing encryption may be regulated by the U. S. Department of Commerce, Bureau of Industry and Security (for more information, visit www. bis. doc. gov). Actual data rates may vary depending on operating environment and other factors. [. . . ] Actual data rates may vary depending on operating environment and other factors. [. . . ]