ZIP archive of about 20.8 MB whose name, simply 32, gives no hint of the device, board or contents. It may hold schematics, boardview files or firmware dumps, and the number might refer to a flash capacity, though that cannot be confirmed from the name alone. Extract it and check the file names and internal headers before using anything inside. Any board or BIOS material found should be matched against the board number on the PCB, and a backup of the original flash should be taken before any write.
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.