Compressed ZIP package, 9.29 MB, labelled for the MSI MS-6533 motherboard. The name carries no revision, document type or firmware version, so open the archive to see whether it contains schematics, a boardview or BIOS dumps. The larger size suggests several files or scanned pages, though that is not certain. For tracing power rails or checking a short, read the MS-6533 code and revision printed on the board first, because a different revision can move components and change signal routing.
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.