Small 512 KB RAR file for MSI board MS-7057. Its name lists only the model code, so the contents are unknown, though the size is in the range of a compressed BIOS image or a compact document. MS-7xxx is MSI's desktop motherboard numbering. If it holds a firmware dump, confirm the extracted image matches the capacity of the flash chip on the board and back up the original with a programmer first. If it is a schematic, check the PCB revision before trusting the values and nets.
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.