Sandisk 256gb Msata Sd5se2-256g Sdsa5jk-256g Ssd Hdd Module for Asus Zenbook Ux21 Ux31 Taichi 21 SanDisk 256GB SSD Module Capacity: 256GB Compatibility: for Asus Zenbook UX21 UX31 Taichi 21 May fit MAC Interface: mSATA Type: Internal SSD