An archive of repair files for ASUS hardware (board 60NB0DE0-MB5010). Shared as “60NB0DE0-MB5010(X540UP MB) (2).rar” — a .rar file, 146 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 @SCHEMATICWORLD. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.