This product is either discontinued or we cannot get that from suppliers.
Transcend TS480GJDM520, Internal / External Solid State Drive (SSD), 480GB, MLC, USB 3.0 / SATA 6Gb/s, Read Up to 570 MBps, Write Up to 460 MBps, 0°C ~ +70°C .
Introducing our new JetDrive SSD upgrade kit for the MacBook Air and MacBook Pro with Retina display. Complete with tools, instructions, and a slick aluminum USB 3.1 Gen 1 enclosure to house your original SSD.