Lenovo ThinkPad T450 i5-5300U 8GB New hard drive 240GB SSD 1366x768 Class A Windows 10 Professional Windows 10 Professional | Laptops \ Brand \ Lenovo \ Lenovo ThinkPad Laptops \ Screen size \
Upgrading a ThinkPad T450s with an M.2 SSD - James Ridgway
Lenovo ThinkPad T450s Review - Laptop Reviews by MobileTechReview
256 GB HDD NGFF M2 2242 SATA SSD Disco a Stato Solido per Lenovo thinkpad X250 T450 S1 yogo T440 T440P T440s T450 T540 T540p : Amazon.it: Informatica
Looks like m.2 2280 worked out just fine for t450s : r/thinkpad
NOTEBOOK LENOVO 14" ThinkPad T450 HD i5-5300U W10Pro – Bitprice