DY-tech SATA 2nd SSD HDD HD Caddy for Dell M4600 M6400 M6500 M6600 E6520 3300 1340 M14X Add the 2nd drive to your laptop by replacing your optical drive; Notice: Universal 9.5mm height SATA-to-SATA Optical bay Caddy Adapter Tray; Need to remove buyer's optical drive faceplate and mounting bracket / ejector latch to re-use onto the caddy for proper working! This device accepts 2.5" inch 9.5mm / 7mm high or less SATA HDD / SSD; Compatible with: for Dell M4600 M6400 M6500 M6600 E6520 3300 1340 M14X Notice: Buyers need to remove their optical drive Front Panel(bezel) and Mounting Bracket to re-use onto the caddy for perfect match!!!