Compact 197 KB RAR archive for the ASUS B85M-F, an Intel B85 micro-ATX board for LGA1150 CPUs. The name says nothing about the file types inside. A small archive like this most likely holds a boardview or a single document, so check after extraction. Boardview data helps locate components, follow nets and pinpoint test points when diagnosing shorts or missing voltages. Before relying on part placements, confirm that the PCB revision on the board matches the file.
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 @boardview. 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.
7-ZipWinRARThe Unarchiver (macOS)