MSI MS-7198 motherboard files in a 4.09 MB RAR archive. The name provides the board number only, leaving the type of content, schematic, boardview or BIOS, to be confirmed once unpacked. MSI numbers its desktop boards in the MS-7xxx series and prints the code plus revision on the PCB. Check those markings before using the material to trace circuits or replace parts, and for any firmware inside, dump and save the original chip with a programmer before writing the new image.
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.