Small RAR archive, only 17.2 KB, labelled for the ASUS U80V laptop and numbered as the fourth file in a set. Nothing in the name says what it holds. A package this small cannot contain a full schematic, so it is more likely a boardview, a text note or a compact firmware fragment. Extract it with WinRAR or 7-Zip and identify the contents first. Then check them against the board revision printed on the motherboard, and keep a backup of any chip before flashing replacement data.
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.