A schematic diagram for Lenovo hardware (board NM-E401). Shared as “NM-E401.zip” — a .zip file, 5.93 MB.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @ZINFOSERVICECHANNEL1. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.