A boardview (component placement) file (board 213039-1). Shared as “213039-1.brd.zip” — a .zip file, 73.9 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 @L9BCM2MdAgNjNDk1. 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