Compact 151 KB RAR tied to the X450LD at revision 1.1, the earliest of the revisions in this set, probably the Asus laptop board. The name does not reveal the contents, which could be a boardview, an EC binary or a small firmware image. Extract it and check the file types first. Boardview data opens in viewers such as OpenBoardView or FlexBV, while binaries are written with an SPI programmer. Check that the PCB is revision 1.1 before using it, and keep a backup of any chip you overwrite.
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 @schematicslaptop. 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.