MSI MS-7122 package, a 2.62 MB RAR archive. The file name is limited to the brand and board code, so contents and revision are unknown until it is extracted. Typical uses include checking power sequencing on a schematic, locating components and test points, or recovering a corrupted BIOS with a programmer. MSI uses the MS-7xxx pattern for its desktop mainboards. Match the board marking and revision, and keep a backup of the original flash before making changes.
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)