Deyoung 2nd HDD SSD Hard Drive SATA Caddy For ASUS S550 S551 X550 X550L N550 K550 K551L X550C X550CA X550V X550VC X550dp Add a 2nd drive to your laptop by replacing your optical drive This is Universal SATA-to-SATA Optical bay Caddy Adapter Tray; This device accepts 2.5" inch 9.5mm / 7mm high or less SATA HDD / SSD. Compatible with: ASUS S550 S551 X550 X550L N550 K550 K551L X550C X550CA X550V X550VC X550dp Notice: Buyers need to remove their optical drive faceplate(bezel) and Bracket to re-use onto the caddy for proper working!!!