TarDisk 128GB | Storage Expansion Card for MacBook Pro 15" | R15A (MacBook Retina) Hybrid Drive: Simplest way to increase onboard  MacBook Storage. Flush, seamless integration into SDXC port. Additional storage space is added directly to existing Hard Drive presenting the user with a single, larger, unified volume. Storage: 256GB integrated flash memory with precision UniBody Aluminum enclosure. Speed: up to 90MB/sec, (UHS-1, Speed Class-3) Fits: 15" Retina MacBook Pro (Mid 2012, Early 2013) | MacBookPro10,1