Looks like m.2 2280 worked out just fine for t450s : r/thinkpad
I've joined the ThinkPad cult!!! Upgrade plans in the comments! : r/thinkpad
Lenovo ThinkPad T450s - 14" - Core i5 5300U - vPro - 8 GB RAM - 256 GB SSD - US
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Memory RAM | 16GB - Lenovo ThinkPad T450s T-Series - (OEM-# 4X70J32868) - 1600MHz, Unbuffered, 1,35V
Lenovo Thinkpad T450s Laptop SSD/HD Replacement - YouTube
Lenovo Thinkpad T450 SSD Replacement - iFixit Repair Guide
Lenovo T440s – M.2 NGFF SSD upgrade | Mohnish's tidbits
Lenovo ThinkPad T450s Disassembly and RAM, HDD, SSD upgrade options - Laptopmain.com
SSD Upgrade for Lenovo ThinkPad T450 256GB/512GB/1TB/2TB | eBay
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Lenovo T450S 14´´ i7-5600U/12GB/240GB SSD W8 Laptop Refurbished| Techinn
