MSI MS-7184 service archive in RAR format, 4.54 MB. The name names the board only, so whether it contains circuit diagrams, firmware or both remains unknown until it is opened with WinRAR, 7-Zip or a similar tool. MSI uses the MS-7 prefix for its desktop motherboards, and the code is silkscreened on the board. A technician should match that marking and the revision first; schematics help trace power rails and signals, while any BIOS file should be written only after backing up the original chip.
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.