MSI MS-7104 repair package in RAR format, weighing 5.06 MB. Nothing beyond the maker and board number appears in the name, so it is unclear whether the archive holds a schematic, a boardview, a BIOS dump or a mix. MSI applies the MS-7xxx pattern to its desktop mainboards, so the number should be printed near the slots or on the PCB edge. Open the archive with WinRAR or 7-Zip, confirm the revision matches your board, and treat any firmware image with care, keeping a backup of the original chip first.
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.