RAR archive labelled with the Quanta project code G7BD, a 3.37 MB package whose name does not say whether it holds a schematic, boardview or firmware. Quanta identifies its laptop motherboards by short alphanumeric project codes, and the same code usually appears silkscreened on the PCB next to a DA-series board number. Extract the archive and inspect the contents before use, then confirm the code and revision printed on your board match. Schematics open in a PDF reader, while boardview files need a viewer such as OpenBoardView or FlexBV.
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.