MacBook Mini Drive Storage, GMYLE Mircro SD (TF) Flash Memory Card Adapter Expansion to SD Slot for MacBook Pro Retina 13 (Not fit with MacBook Pro)(Black) Plug and play adapter, adding storage space to your Macbook by 1 Step with the Mini Drive. Seamless design, Weighs next-to-nothing, fits snugly into your MacBook's Flash SD card slot, invisible once plugged in. Support up to 256GB Micro SDHC (TF Card) (memory Card not included), and integrate with your MacBook's native Time Machine. Compatible with Macbook Pro Retina 13 (Not fit with Macbook Pro ). 24 Months Worry-free warranty backed by GMYLE.