A boardview (component placement) file. Shared as “IT SERVICE WORLD_QD-R62-MB-E.bdv.zip” — a .zip file, 401 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 @IT_SERVICE_WORLD. 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