The MiniDrive | 128gb | For MacBook Retina 15" 2014+ | Flash Memory Expansion Module Adds 128GB of extra flash storage space to your MacBook instantly. Read-Speed up to 95MB/sec, Write-Speed up to 60MB/sec. Sits flush and fits securely into the SD slot. NEW Custom cap engineered for seamless flush fit! Fits: MacBook Retina 15" purchased after October 22, 2013 | &2014 Shipped in non-retail OEM packaging.