Compressed archive labelled with the MSI board code MS-N01X and revision 0A, with no model name given. MS-N0xx codes are associated with MSI netbook mainboards, and the X in the number suggests a document shared across a family of variants rather than one exact board. At 569 KB the RAR probably holds a schematic for tracing charger, power sequencing and embedded controller signals. Check the full board code and revision printed on your PCB against the title block inside before relying on any values.
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.