Archive of about 1.15 MB for MSI board MS-12221 at revision 1.0, in RAR format. No product name or content type appears in the file name, so extract it to see whether it is a schematic, a boardview or both. The MS-1xxxx pattern is used by MSI for notebook mainboards, and the code and revision on the PCB should match before you trust the data. Typical uses include following charger and power rails, checking the power-on sequence and locating shorted components.
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)