Compressed files for the MSI MS-7120 motherboard, 2.15 MB in RAR format. Nothing besides the board number is given, so whether this is a schematic, boardview or BIOS dump has to be checked after unpacking with 7-Zip or WinRAR. The MS-7xxx code is how MSI identifies its desktop boards, and it is printed on the PCB with a revision. Confirm the match before measuring against the documents, and read out and save the original BIOS before flashing.
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)