RAR package for the H97M-E motherboard, an Intel H97 micro-ATX board, 239 KB in size. The name identifies just the model, so the exact document type and board revision are not given. Small archives like this usually carry boardview or schematic material that a technician uses to find components, follow nets, inspect power rails and locate test points when a board will not start. Extract it with any RAR-capable tool and confirm the revision printed on the PCB matches the data before relying on it for repair.
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.