RAR archive of 1.94 MB for the Quanta X13 platform. The name says nothing else, with no brand, laptop model, board number or revision given, so the contents need to be checked to identify the exact machine. Quanta project archives typically contain a schematic and sometimes a boardview, used to trace power rails, check sequencing and locate components and test points. Look for the X13 marking and the revision on the motherboard before relying on the documents.
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.
7-ZipWinRARThe Unarchiver (macOS)