Archive of 743 KB in RAR format for the MSI MS-7055 board. The only information in the name is the board number; revision and contents are not given. MS-7xxx is the numbering MSI uses for its own desktop motherboards, printed on the PCB. Small archives like this often contain a BIOS image or a short document, but open it to confirm. Before reflashing, read the existing chip with a programmer and keep the backup, and make sure the image size equals the flash capacity.
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 .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.