Compressed archive of roughly 1.9 MB for the Lenovo G470 and G570 laptops. The name lists only the model names, with no motherboard number, revision or file type, so the contents must be checked after unpacking the RAR. Material for these models is typically schematic or boardview data used to find components, trace voltage rails and diagnose power problems. Since the 14-inch and 15-inch models may share a board, read the board number on your PCB and confirm it matches the documentation before relying on it.
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 @alischematics. 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.