Inside the Lenovo ThinkPad E550 - disassembly, internal photos and upgrade options | LaptopMedia.com
How to Upgrade Lenovo Hard Drive to SSD without Reinstalling Windows 10
2nd HDD / SSD Caddy for Lenovo ThinkPad E550 and E560 series [OBHD9-SATA-SATA-BU9] - $20.98 : NewmodeUS, Hard Drive Caddys for Notebooks
Lenovo Thinkpad Edge E550 HDD Caddy
Amazon.com: NIGUDEYANG 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