The Seagate FreeAgent GoFlex Ultra–portable drive STAA1000104 delivers ease of use, automatic continuous backup and encryption for all your files with an ultra-fast, plug-and-play USB 3.0 connectivity. And, as the core of the GoFlex Storage System, the drive offers you the abilities to easily access your content on your network, your TV, and everywhere you go when combined with other GoFlex devices. Form Factor: 2.5" Interface: USB 3.0 Dimensions: 4.71" x 3.51" x 0.87" Weight: 0.62 lbs. Features: Encryption: 192-bit Triple DES Automatic Backup Software: PC & Mac 22mm: Yes System Requirements: Windows 7, Windows Vista, Windows XP (32-bit & 64-bit) operating system or Operating system Mac OS X 10.5.8 or higher. Reformatting for Mac may be required. USB 3.0 or USB 2.0 port. Package Contents: GoFlex ultra-portable drive Backup with encryption software pre-loaded on drive NTFS driver for Mac pre-loaded on drive GoFlex USB 3.0 or USB 2.0 interface adapter 18-inch USB 3.0 or USB 2.0 cable Quick start guide