Instantly add up to 256GB of lighting fast onboard, flash memory storage to your 13" MacBook Pro with Retina Display. TarDisk takes advantage of next-generation flash memory controllers developed for high-definition 4k filming. Premium, high-density, MLC flash memory modules are used -- the same as those found in many SSDs. Performance exceeds a USB2.0 external Hard-Drive. Plug a TarDisk into the side of your MacBook computer and you are done. No tools necessary for installation or removal. Semi-Permanent MiniDrive Storage Expansion Card.