G-Technology G-DRIVE Professional External Hard Drive 4TB (Gen5, USB 3.0/FireWire 800) (0G02537)-(Certified Refurbished) This Certified Refurbished product is tested & certified to work like-new. The product is backed by a 90 day warranty USB 3.0 and FireWire ports for flexible, high-speed data transfer Integrated heat-sink for near silent operation and cooling Solid all-aluminum case makes for durability and stylish looks 4TB storage capacity handles digital video, music and photo files