RAR archive, 3.00 MB, for the MSI MS-7172 desktop motherboard. Apart from the board number, the name offers no detail, so its contents remain unknown until extracted. The MS-7 prefix follows MSI's numbering for desktop boards and is visible on the PCB silkscreen. When the archive holds a schematic, use it to follow power sequencing and locate test points; when it holds a BIOS, compare the image size with the flash chip and save a dump of the original before programming.
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.