Boardview for MSI laptop board MS-17221, compressed in a small 97.9 KB RAR, with no revision given in the name. Boardview data maps parts, pins and nets to their physical positions, letting a technician locate a test point or find every component on a shorted rail in seconds. Open it with OpenBoardView, FlexBV or another compatible viewer after extraction. The matching schematic for MS-17221 is available separately. Because the revision is not stated, compare the layout with your PCB before trusting designators.
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 @IT_SERVICE_WORLD. 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.