Archive labelled MSI MS-6590, zip format, 1.28 MB. The name is limited to the brand and board number, so no revision, chipset or content type can be stated. Typical contents for packages like this are a BIOS file, a flash utility or a short service schematic. MSI uses the MS- prefix for boards it designs itself, with the code printed on the PCB. Check that code and the revision, and dump the existing firmware chip before attempting any reprogramming with the files inside.
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