For the MSI MS-7058 desktop board, this 1.76 MB RAR archive carries no further detail in its name: revision, chipset and contents are unstated. MSI applies the MS-7xxx scheme to motherboards it designs itself, so the number on the PCB should read the same. Typical uses are tracing voltage regulators and signal paths in a schematic or restoring a corrupted BIOS with an external programmer. Check the PCB revision against any document inside, and keep a backup of the original flash before writing.
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.