Compressed archive of 1.94 MB for the MSI motherboard coded MS-6747. Nothing else is stated in the name: no revision, no file type, no BIOS version. Inspect the extracted files to learn whether they are circuit diagrams, firmware or other reference material. The MS- code is MSI's internal board designation and is printed on the PCB, so match it and the revision marking first. When reflashing, confirm the image size equals the flash chip capacity and keep a copy of the original read.
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.