ZIP package for the MSI MS-7356 board, 6.08 MB. Beyond the board number the name says nothing about revision, chipset or contents. A file this size may hold a schematic set, a boardview or several firmware versions, so inspect it after extraction. MS-7xxx is MSI's own scheme for desktop motherboards, including those built for OEM partners. Use the files to check rails and signals and to find test points, after confirming the PCB number and revision match the documents.
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.