Lenovo Thinkpad T440s Hard Drive Replacement - iFixit Repair Guide
ThinkPad T440p SSD Upgrade with Transcend MTS400 256GB 2242 M.2 SSD – Mostly About Computers
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0C19810 Lenovo 256GB TLC SATA 3Gbps 2.5-inch Internal Solid State Drive (SSD) for ThinkPad T440
Lenovo ThinkPad T440 14.0" Intel Core i7-4600U, 8GB, 240GB SSD, Windows 10 Pro - USED with 60 day hassle free returns. - Walmart.com