RAR archive, 2.24 MB, for the MSI MS-7131 board. The name does not describe the contents, give a revision or mention a firmware version, so review what is inside after extraction with 7-Zip or WinRAR. Schematics in such packages are useful for checking VRM circuits and standby rails, and BIOS dumps for recovering a board that fails to post. MSI marks the MS-7131 code and a revision on the PCB. Confirm both, and save the original chip contents before reflashing.
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.
7-ZipWinRARThe Unarchiver (macOS)