RAR archive of 4.84 MB for the MSI MS-7067 motherboard. The name lists only brand and board number, with no revision or content type. A boardview for revision 100 of this board is indexed separately and may pair with whatever schematic or firmware this package contains. Unpack with 7-Zip or WinRAR and compare the revision on the PCB with the files. MS-7xxx is MSI's desktop numbering scheme; back up the original SPI flash before writing any BIOS image found inside.
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.