MSI MS-7418 board package, a fairly large 6.34 MB RAR archive. The name gives no revision or content description, so the size alone cannot show whether it holds several documents or a single firmware image. Open it to check. MS-7xxx is the numbering MSI uses for its own motherboard designs. Schematics open in a PDF viewer, and boardview files need a dedicated viewer. Confirm the PCB revision first, and save the original BIOS before writing any dump with a programmer.
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.