ZIP archive of about 1.60 MB for the MSI MS-7522 motherboard; the name states neither a revision nor the content type. Boardviews for revisions 1.0, 2.0 and V31 of this board also exist, so this pack may hold a schematic, a BIOS image or another layout, and you should check after extracting. Before applying it, read the revision printed on the PCB, since revisions can differ in layout. If firmware is included, dump the original flash chip first and confirm the image size matches its capacity before writing.
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.