Seagate Backup Plus Slim 500GB Portable Hard Drive for Mac with Mobile Device Backup, USB 3.0 (STCF500102) (Certified Refurbished) This Certified Refurbished product is tested & certified by Seagate to look and work like new. The product includes all original accessories, and is backed by a 90-day warranty. Create easy customized backup plans with included Seagate Dashboard software Backup your mobile device photos and videos automatically with the Lyve App Quick file transfer with USB 3.0 connectivity USB powered - no power supply necessary