RAR archive for the MSI board numbered MS-7065, about 2.06 MB. The name gives only the board number, with no revision and no hint of contents, so it may hold a schematic, a BIOS image or both. MSI uses MS-7xxx numbers for its own desktop motherboards, and the code is usually printed on the PCB near the expansion slots. Unpack it with WinRAR or 7-Zip, check what is inside, and compare the revision on the board before tracing rails or flashing anything.
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.
7-ZipWinRARThe Unarchiver (macOS)