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 ROG GL752VW-DH71 m2 slot does not work - YouTube
1TB SSDnow NVME M.2 2280 SATA 6GB Compatible with ASUS/Asmobile Notebook ROG GL552VW by CMS D95 - Computer Memory Solutions