Amazon.com: NIGUDEYANG 2nd HDD SSD Hard Drive Optical Frame Caddy Adapter for Lenovo ThinkPad E440 E540 E431 E531 only with Bezel Front Panel Faceplate Metal Bracket Holder : Electronics
CMS 16GB (2X8GB) DDR3 12800 1600MHz Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Thinkpad E540 Notebook - A7 at Amazon.com
Lenovo Thinkpad E540 Hard Drive Replacement - iFixit Repair Guide