Laptop boardview set covering MSI boards MS-16U71 and MS-17E71, which the name ties to the GL65, GL75, GP65 and GP75 gaming notebooks; the 2.96 MB RAR likely holds a file for each board. MSI designs these mainboards in-house, with MS-16xxx usually used for 15-inch and MS-17xxx for 17-inch models. Use the layout in a boardview viewer to trace charging, CPU and GPU power rails, locate a shorted MOSFET or capacitor and find test points. Match the board number on the PCB to pick the right file.
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 @BoardSchematic. 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.