RAR archive of about 1.8 MB tagged ASUS B34Y, with no indication of whether it holds a schematic, boardview or firmware. B34Y appears to be a model or board code, but the name gives no revision, so inspect the contents and compare with the markings on the actual PCB. Small archives of this size often contain boardview or BIOS files used to locate components, test points and rails or to reflash a chip. Before writing any dump, back up the original flash and confirm the image size matches.
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 @boardviewsandachematics. 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.