RAR archive of 1.23 MB labelled for the G501JW, with an RG suffix whose meaning the name does not explain. The content type is not stated, so the package may hold a schematic, boardview or firmware for this laptop model; extract it and check before use. Files of this size often contain a PDF circuit diagram used to trace the charger, the system power rails, the CPU and GPU regulators and the sequencing signals controlled by the embedded controller. Confirm the motherboard number and revision printed on your board match whatever document is inside.
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 @cyberlanelectonik. 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.