Compressed ZIP package, 3.43 MB, for the MSI MS-7389 desktop motherboard. The name does not mention a revision or describe the files inside, so their nature has to be confirmed after extraction. MSI's MS-7xxx codes identify its desktop boards and also turn up on systems MSI built for OEM brands. Such documents help when tracing the VRM, clock and reset circuits on a board that will not start. Match the board number and revision on the PCB before relying on anything inside.
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 .zip file
Compressed archive that every operating system opens without extra software.