Iomega eGo Helium 320 GB USB 2.0 Portable External Hard Drive 34943 Ultra Thin: Thin and lightweight (0.36 lb.) USB 2.0 portable hard drive Stylish: Perfect match for the MacBook Air notebook (HFS+ format); compact silver design slips easily into a purse or briefcase Rugged: The Drop Guard feature protects the drive when dropped up to 51-Inch (40% above the industry average!) Secure: Trend Smart surfing for Mac software (12 mo subscription) protects your online experience, plus backup files with Iomega QuikProtect or MozyHome Online Backup software (2 GB free - via free download) 3 Year Warranty with product registration