RAR archive of about 756 KB for MSI laptop board MS-16332 at revision 0A. The name carries no model name and no hint of the contents, so open it to see whether a schematic or boardview is inside. Revision 0A is typically an early release, and later revisions of the same board can change component values or placement, so check the marking on the PCB first. Technicians use such files to trace power rails, find test points and identify the parts involved when a notebook shows no power or will not charge.
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.