BEWARE: Lenovo Thinkpad L15 Gen3 SSD is practically un-upgradeable. Laptop comes with 256GB and bigger SSD is too thick to fit. There also goes a cooling plate on top. : r/thinkpad
New Lenovo ThinkPad Notebooks Announced, mSATA SSDs For Everyone! - StorageReview.com
Lenovo Thinkpad T480 SSD Upgrade - I am Sam - samuelgoh.net
Lenovo Ssd 240 Gb 1tb 120 Gb 128gb 256gb 480gb 512gb Hdd Internal Solid State Drive Sata 3 2.5 Inch Hard Disk Hd For Laptop Pc - Solid State Drives - AliExpress