Lenovo ThinkPad T440 m.2 SSD and 2.5" SSD Install (how to + test run) - 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)
Lenovo ThinkPad T440, T440S, T440P, T450 Series Laptop 2.5 Hard Drive/SSD Drive | eBay
ThinkPad T440p SSD Upgrade with Transcend MTS400 256GB 2242 M.2 SSD – Mostly About Computers
PowerEdge T440 T640 - Dell 1.92TB SSD SAS Mix Use 3.5 inch Hybrid Drive for Gen14 SAN NAS DAS