Lenovo THINKPAD T440s - 240 GB SSD SATA Hard Drive | eBay
TUTORIAL: Lenovo T440P M.2 SATA SSD Upgrade - YouTube
Amazon.com: Lenovo Thinkpad T440 Ultrabook 14in HD LED-backlit High Performance Business Notebook, Intel Core i5-4300U up to 2.9GHz, 8GB RAM, 128GB SSD, USB 3.0, Windows 10 Professional (Renewed) : Electronics