E550 E550C notebook for Lenovo ThinkPad motherboard FRU 00HT584 CPU i3 4005U DDR3 NM-A221 100% test work - Newegg.com
Amazon.com: 2nd HDD SSD Hard Drive Optical Frame Caddy Adapter for Lenovo ThinkPad E550 E550C E555 E560 E565 only with Bezel Front Panel Faceplate Metal Bracket Holder : Electronics
ThinkPad E550, E555, E550c Hard Disk Drive and Solid State Drive Replacement - YouTube
2nd HDD / SSD Caddy for Lenovo ThinkPad E550 and E560 series [OBHD9-SATA-SATA-BU9] - $20.98 : NewmodeUS, Hard Drive Caddys for Notebooks
How To Install HDD And SSD Together In Lenovo Laptops | Tom's Guide Forum
Inside the Lenovo ThinkPad E550 - disassembly, internal photos and upgrade options | LaptopMedia.com
Lenovo ThinkPad Broadwell Updates for T550, T450s, E550, E450, and L450
Inside the Lenovo ThinkPad E550 - disassembly, internal photos and upgrade options | LaptopMedia.com