RAR archive of 478 KB for PR111, revision A02, according to its name. The brand and document type are not stated, so extract it with a tool such as 7-Zip or WinRAR and check what is inside before use. A02 style revision suffixes indicate a specific board or firmware release, and only boards carrying the same marking should receive this file. If it is a BIOS dump, read and store the current chip contents with a programmer first and ensure the image size matches 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 @laptopchiplevelrepair. 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.