MSI MS-7174 motherboard archive in RAR format, 4.70 MB. No contents are described in the name, so whether it carries a schematic, BIOS or other service files must be determined by unpacking it. MSI desktop boards carry MS-7 numbers, silkscreened on the PCB together with a revision marking. Check both against your board before working from the files, and before reprogramming any firmware chip take a full backup with a programmer and confirm the image size equals the chip capacity.
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 .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.