MSI MS-6534 material packed as a 2.49 MB ZIP file. Apart from the manufacturer and board code, the file name says nothing about what is inside, so it may hold a schematic, BIOS files or other service data. MSI prints the MS- number directly on its desktop motherboards, usually near the PCI slots, together with a revision tag. Match both before trusting the data, and if a BIOS image is included, back up the existing chip with a programmer 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