A boardview (component placement) file (board DA0W05MB8E0). Shared as “Quanta W05-MB-C DA0W05MB8E0 (.BDV) .zip” — a .zip file, 199 KB.
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 @generalbios. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip