A schematic diagram for MSI hardware (board MS-17F6, MS-17F61). Shared as “MSI MS-17F6 MS-17F61 VER 1.0 PDF .rar” — a .rar file, 2.45 MB.
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 @generalbios. 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.