The MiniDrive | 128gb | For MacBook Air | Flash Memory Expansion Module Adds 128GB of extra flash storage space to your MacBook Air. Read-Speed upto 90MB/sec, Write-Speed upto 60MB/sec. 100% Flush: Sits in the SD slot seamlessly. Faster than a microSD card. Fits: MacBook AIR 13 Late 2010+ Shipped in non-retail OEM packaging.