RAR archive of about 627 KB labeled only with the MSI board number MS-6382; no revision or document type is stated. The contents are probably a schematic, but they are unverified, so open the archive to check what it holds. MSI used MS-6xxx numbers for its own desktop motherboards. A diagram of this kind helps with tracing standby and main power, checking the CPU regulator and finding shorted components. With no revision given, compare the drawings carefully with the physical board before replacing parts.
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.