Deepfox 12.7mm IDE to SATA Universal 2nd HDD Caddy 2.5" HDD SSD Case for Laptop Improve laptop boot and running speed and capacity with extra SSD hard drive. Can expand your system and storage capacity with an additional hard drive. Support installation of 2nd operating system on the 2nd HDD and boot selection. Replace your laptop CD / DVD drive with a second hard drive or solid state drive. Fast & Reliable connection in laptop, just as the primary HDD.