TarDisk 64GB - Storage Expansion Card for 13" MacBook Air - A13A Hybrid Drive: Simplest way to increase onboard MacBook Storage. Flush, seamless integration into SDXC slot for direct connection to system. Additional storage space is added directly to existing Hard Drive presenting the user with a single, larger, unified volume. Storage: 64GB integrated flash memory with precision UniBody Aluminum enclosure Speed: up to 90MB/sec, UHS-1, speed class-3 Fits: 13" MacBook Air