I bought a 2,5” SSD for my thinkpad e595 and when I've opened it, theres something in the ssd slot. I bought it just with M.2 memory, so I don't know what
Amazon.com: 240GB 2.5" SSD Solid State Drive for Lenovo/IBM Thinkpad T520-4241 T520-4242 T520-4243 T420-4177 T420-4178 T420-4180 T420-4236 T410-2516 : Electronics
Lenovo Thinkpad T480 SSD Upgrade - I am Sam - samuelgoh.net