RAR package of 134 KB for the ASUS U80V notebook, marked as the third item in a numbered series of files for that model. The name carries no revision, board code or content description, so the contents must be checked after extraction. Files of this size often turn out to be boardview data or a BIOS or EC firmware image. Boardview files help locate components and test points, while dumps are written to the SPI flash with a programmer once the original chip contents have been saved.
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 @ITHINKHS. 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.