The GoFlex Slim performance drive is the optimal capacity addition for po rtable devices with limited storage.The ultra-thin anodized case not only helps resist against damage while transporting, it also adds a uniqueand premium finish to the drive. It is about as thick as a pencil, al lowing you to slide it in a computer case,backpack or pocket so you can take your content anywhere and everywhere. The GoFlex Slim performancedrive is not only thinner than most external drives, it also offers performance and compatibility with USB3.0. This performace drive takes advantage of the included plu g-and-play USB 3.0 interface, allowing forfaster transfer speeds. USB 3.0 is backwards compatible with USB 2.0 (at USB 2.0 speeds), offering furtherinterface flexibility. Install the pre-loaded NTFS driver on a Mac and use the drive interchangeably between PCand Mac computers without formatting and performance loss. Premium automatic backup and encryptionsoftware is also pre-loaded on the drive for ease of installation.