DiGiYes 12.7mm / 0.5in Universal Second SATA HDD Hard Drive Caddy Module Adapter for Lenovo Thinkpad T520 W520 SATA Second Hard Disk Drive HDD caddy/adapter for any uses 9.5mm height DVD drive with SATA connector to the motherboard. It work with SATA hard drive, and SSD (Solid State Drive) as well. Fast & reliable connection, just as the primary HDD. Fully integrated into laptop, no cables/PSU/software driver needed. Dual boot, support installation of 2nd operating system on the 2nd HDD and boot selection.