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
Upgrading my Lenovo E590 Laptop - Jeremy's Dotnet Blog
Lenovo ThinkPad E590 15.6" Genuine Laptop Bottom Case Base Cover AP1AJ000100