Amazon.com: 2nd HDD SSD Caddy SATA3 Second Solid State Hard Drive Enclosure, for Samsung NP300 NP550 Series NP300E5A NP300E5C NP300V5A NP550P5C NP550P7C NP550P5CL Laptop, CD DVD Optical Bay New : Electronics
Amazon.com: DY-tech 2nd HDD SSD Hard Drive Caddy Adapter for Samsung 300E5A np300v5a-a0eu np500pc4 : Electronics
Samsung NP300E5C Hard Drive Replacement - iFixit Repair Guide