Generic zip archive of about 24.0 MB whose name gives no hint about the device, board or contents. It could contain schematics, boardviews, firmware or photos, so open it and inspect the files before filing or using anything inside. When any dumps turn up, identify the matching board number and flash chip size, and back up the existing chip before writing. For drawings or layouts, confirm the board number and revision printed on the PCB match what the documents describe.
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 @vinafix_bios. 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