9.5mm 2nd HDD SSD Hard Drive Caddy for Dell Precision M4600 M6400 M6500 M6600 HDD / SSD Accessories - Newegg.com
Dell Precision M4600 and M6600 added 512GB SATA 6.0 Gpbs SSD options | TechSpot
SSD Upgrade for Dell Precision Mobile M4600 (2 slots) 256GB/512GB/1TB/2TB | eBay
Amazon.com: Laptop 2nd HDD SSD Caddy SATA3 Second Solid State Drive Enclosure for Dell Precision M4800 M6600 M6700 M4600 M6400 M6500 M4700 M4500 M4400 Mobile Workstation, CD DVD BD Optical Bay Replacement :
Upgrade Options for Dell Precision M4600 Mobile Workstation - Drive Solutions