Deyoung SATA 2nd SSD HDD Hard Drive Caddy for HP ProBook 6440b 6445b 6450b 6455b 6550b 6555b with Bezel / Faceplate + Bracket Add a 2nd drive to your laptop by replacing your optical drive Comes with Original Faceplate / Bezel and Mounting Bracket. Don't need to re-use it from original DVD drive. Works in optical drive bay of HP ProBook 6440b 6445b 6450b 6455b 6550b 6555b Notobook The hard drive attaches to the caddy from the side using long screws This device accepts 2.5" inch 12.5mm / 9.5mm / 7mm high or less SATA HDD / SSD