Product Description The Transcend 960GB JetDrive 825 Thunderbolt External SSD TS960GJDM825 takes a PCIe 3.0 x2 M.2 SSD and combines it with an aluminum Thunderbolt enclosure, thus providing a fast and portable storage drive for select Thunderbolt-equipped Apple systems, such as the MacBook Air, MacBook Pro with Retina Display, Mac mini, and Mac Pro. 960GB Storage Capacity; 10 Gb/s Thunderbolt Interface Up to 950 MB/s Data Transfer Speed PCIe Gen 3.0 x2 Storage Media; 3D NAND Flash Compatible with MacBook Air 11" & 13" (Mid 2013 – 2017, exclude Early 2015), MacBook Pro Retina 13" & 15" (Late 2013 – Mid 2015), Mac mini (Late 2014), and Mac Pro (Late 2013) Bus Powered