Iomega eGo Helium 500 GB USB 2.0 Portable External Hard Drive 34709 Ultra Thin - Thin and lightweight (.44 lb.) USB 2.0 portable hard drive Stylish - Perfect match for the new MacBook Air notebook (HFS+ formatted); 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 -EMC Retrospect software and MozyHome Online software included for backup (via download) 3 year warranty with product registration