Documentation archive for MSI notebook mainboard MS-17221, no revision stated, packed as a 1.78 MB RAR. MSI notebook boards carry MS-1xxxx numbers, and the trailing digit identifies a specific board version, so check it closely. The content is likely a schematic used to trace the DC-in path, battery charger, CPU and GPU rails and EC signals when diagnosing no-power or no-display faults. A separate boardview for the same number exists, and combining both makes component location far quicker. Check the revision on the PCB against the title block.
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.