RAR archive of 680 KB for the MSI MS-7010 board, revision 10A. The name gives no content type, so extract it to see whether it is a schematic, a boardview or firmware. Revision-specific files matter on this board, as separate packages for rev 0A and rev 100 also exist and their details may differ. Technicians use such data to follow voltage rails, check reset and clock signals and locate components. MS-7xxx is MSI's numbering. Match the PCB revision exactly and back up the BIOS chip before any reflash.
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.