Archive in RAR format, 789 KB, named for MS-N0111 and marked as decrypted, which suggests a protected schematic or boardview file that has been converted into an openable form. MS-N numbers follow MSI internal board numbering, but the name states nothing more about model or revision. Decrypted documentation lets a technician read nets, part references and power rails in standard viewers instead of a locked format. Verify that the board marking matches MS-N0111 and check the extracted file opens correctly before relying on it for measurements.
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 @generalschematics. 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.