MSI MS-7508 board package in ZIP format, 2.91 MB. The name gives only the MSI board number, with no revision, chipset or document type, so inspect the contents after extraction. MS-7xxx codes are MSI's in-house numbering for motherboards it designs itself. Use a schematic to find VRM components, fuses and test points, or open boardview files in a compatible viewer. Make sure the revision on the board matches, and dump the existing BIOS chip before writing anything new.
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.
Built-in OS tools7-Zip