M.2 (NGFF) SSD to 18 Pin SSD Adapter for Asus UX31 UX21 Zenbook The adapter is not compatible for any Apple brand laptops, designs only for Asus ZenBook The adapter supports only 4 sizes of NGFF SSD (2230/2242/2260/2280mm) The transmission speed and other properties are not changed after installing this adapter and NGFF SSD You can properly install the O/S on Asus UX21 UX31 ZenBook No drivers needed for this adapter