Amazon.com: 2nd HDD SSD Hard Drive Caddy, for Asus Laptop ROG GL552 GL553 GL552VW GL552V GL551J GL551JW GL553 GL552 GL553VD GL553V, SATA3 Second Solid State Disk Enclosure, CD DVD Optical Bay Replacement :
ASUS FX553VD (ROG Strix GL553VD) review - good value with a few hiccups | LaptopMedia.com
ASUS ROG GL553VE Disassembly and SSD, HDD, RAM upgrade options
User manual Asus ROG Strix GL553VD (English - 126 pages)