Transcend’s JetDrive 855 Thunderbolt™ PCIe portable SSD combines a JetDrive 850 PCIe SSD with a sleek aluminum Thunderbolt enclosure to instantly revitalize your Thunderbolt-equipped MacBook Pro, MacBook Air, Mac mini, or Mac Pro! Thunderbolt technology in a sleek case Transcend’s JetDrive 855 features a 10Gb/s Thunderbolt interface, capable of blazing-fast file transfers. The drive is housed in a sleek, aluminum-alloy enclosure designed to tastefully complement your Mac’s simple, clean lines. In addition, the inner SSD is removable for more versatile use based on your preferences. Expand storage in a flash Upgrading your Mac with a Transcend JetDrive 850 allows you to increase storage capacity to up to 960GB, ensuring you have plenty of space for your documents, photos, music, and videos. Feel the need for speed Transcend’s JetDrive 850 utilizes the PCIe™ Gen3 x4 interface paired with the latest 3D NAND flash, resulting in compelling performance of up to 1,600MB/s read and 1,400MB/s write*. Transcend’s JetDrive 850 gives you fluid, real-time performance for demanding professional tasks, video editing, or 3D graphics rendering. *Note: Performance tested with AJA v1.0 / Black Magic v3.1. JetDrive Toolbox Exclusively developed by Transcend, JetDrive Toolbox helps maintain a healthy and efficient SSD by keeping it up-to-date, preventing functional degradation, and predicting problems before they happen. JetDrive Toolbox clearly displays drive information, S.M.A.R.T. status for possible drive failure, health indicators for estimated lifespan, and facilitates firmware upgrades. It can also identify your Mac model to quickly find out which of our Apple product suits your computer. All the tools you need Inside you’ll find: – JetDrive 855 Thunderbolt PCIe portable SSD – Screwdrivers (T5 & P5) – Rubber feet Upgrading a Mac Pro or Mac mini requires additional screwdrivers.