Service documentation for the MSI GX600 gaming notebook, board MS-163A, delivered in an 846 KB RAR archive. MS-16xx numbers are MSI internal codes for its larger laptop boards. The schematic or boardview inside can be used to trace power rails, the discrete graphics supply, charger circuit and signal routing, and to locate components on a faulty net. No revision is given in the name, so compare the revision mark on the PCB with the drawings before relying on part values or pin assignments.
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 @generalschematics. 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.