RAR archive labelled WS03 MB with VERB, likely board revision B, 16.4 MB in size. The name gives no brand, model or file types, so check after extraction whether it holds schematics, boardview, firmware or photos. Packages of this sort usually support board-level repair: tracing rails and signals, finding components and checking reference values. Before relying on any of it, compare the board code and revision printed on the PCB with WS03 and Ver B, as layouts and values can change between revisions.
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 @Satale_bios_esquemas_Laptop. 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.