RAR archive of about 887 KB named h14bt01, a code that may be a board or firmware identifier, though the name alone does not say what device or file type is inside. Treat it as unidentified until extracted and inspected. If it contains a boardview or schematic, match the board number and revision printed on the PCB first. If it turns out to be a BIOS or EC image, read and save the existing chip contents with a programmer and confirm the image size equals the flash capacity before writing.
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 @cyberlanelectonik. 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.