M.2 NGFF SSD to 18 Pin to Asus UX31 UX21 Adapter Card SATA Transfer 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) No drivers needed for this adapter You can properly install the O/S on Asus UX21 UX31 ZenBook The transmission speed and other properties are not changed after installing this adapter and NGFF SSD