Looks like m.2 2280 worked out just fine for t450s : r/thinkpad
Amazon.com: Lenovo ThinkPad T450s 14in Laptop, Intel Core i5 5300U 2.3Ghz, 8GB DDR3 RAM, 256GB SSD Hard Drive, Webcam, Windows 10 (Renewed) : Electronics
New For 3rd M.2 NGFF Cable For Thinkpad T440 T450 SSD Card Flex Cable Connector | eBay
Lenovo ThinkPad T440 T450 SanDisk 16GB 6Gb/s M.2 SSD Drive 04X4456 SSD0E97864 | eBay
Lenovo ThinkPad T450s Review - Laptop Reviews by MobileTechReview
Lenovo ThinkPad T440 T450 M.2 SSD Adapter Board NS-A056 with Cable DC02C003Z00 | eBay
Amazon.com: eDrive 16GB M.2 NGFF SSD for Lenovo Thinkpad T440 T440p T440s T450 T540 Compatible 00JT035 04X4456 04X4457 04X4483 04Y2169 04Y2185 04Y2197 45N8465 45N8467 CG4-24 L6G-16 L6G-24 U110-16 U110-24 : Electronics
ThinkPad T440, T440s, T450, T450s - Wireless LAN Card Replacement - YouTube
Amazon.com: eDrive 16GB M.2 NGFF SSD for Lenovo Thinkpad T440 T440p T440s T450 T540 Compatible 00JT035 04X4456 04X4457 04X4483 04Y2169 04Y2185 04Y2197 45N8465 45N8467 CG4-24 L6G-16 L6G-24 U110-16 U110-24 : Electronics
TEARDOWN UPGRADE - THINKPAD T450 UPGRADE SSD Msata / M.2 Sata 2242 - YouTube
Upgrading a ThinkPad T450s with an M.2 SSD - James Ridgway
Lenovo ThinkPad T450s Disassembly and RAM, HDD, SSD upgrade options - Laptopmain.com
WWAN/SSD M2.Расширение памяти ноутбука Lenovo T450 и других версий — Сообщество «Компьютерная Помощь» на DRIVE2
Refurbished: Lenovo ThinkPad T480s 14" Touch Screen Laptop Core i7 8GB 1TB SSD M.2 Integrated Graphics Win 10 Home 1 Yr Wty B v.WCA - Newegg.com
Lenovo Thinkpad T450 SSD Replacement - iFixit Repair Guide
Original Lenovo Ssd Speed Up Internal Solid State Disk 64g 128g 256g Ngff 2242 Y410 Y430p T440 T450 E431 M2 For Laptop Notebook - Laptop Repair Components - AliExpress
Lenovo Thinkpad T450s Laptop SSD/HD Replacement - YouTube
Lenovo ThinkPad T450 14" Laptop PC Intel Core i5-5300U 5th Gen 2.3GHz 8GB Ram 512GB SSD Windows 10 Pro Webcam
Thinkpad T450S m.2 slot - Kernel & Hardware - EndeavourOS
How to Clone HDD to SSD in Lenovo Laptop (Bootable)
laptop - Thinkpad T450s WWAN M.2 slot - M or B key? - Super User
T450s-2101-Detection-error-on-SSD1-M-2 - English Community - LENOVO COMMUNITY
New For 3rd M.2 NGFF Cable For Thinkpad T440 T450 SSD Card Flex Cable Connector | eBay
ThinkPad 512GB PCIe NVMe M.2 2242 SSD | Lenovo US
