TarDisk 64GB | Storage Expansion Card for MacBook Pro 15" | R15B (New MacBook Retina) Simplest way to increase onboard MacBook Storage. Flush, seamless integration into SDXC slot for PCIe connection to system. Storage: 64GB integrated flash memory with precision UniBody Aluminum enclosure. Speed: up to 90MB/sec, (UHS-1, Speed Class-3) Fits: 15" Retina MacBook Pro (Late 2013, Mid 2014, Early 2015+)