Zip archive containing the schematic for the MSI MS-7302 board, revision 1.0 by the file name. MS- numbers are MSI's own design codes, used on desktop motherboards and other MSI products. The diagrams help trace the VRM, standby power, chipset rails and front-panel or connector wiring when a board will not power on or POST. Check the MS number and revision printed on the PCB, since later revisions can change part values or placement.
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 @cynetitsolution. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.