CAD boardview for board V330, suffix _71 suggesting revision 7.1 under MSI numbering; the file name names no product, though V330 corresponds to MSI GTX 1070 class cards in this index. With it a technician can view part placement on both sides, highlight nets and select probe points for diagnosing shorts, missing voltages or damaged components. FlexBV, BoardViewer and similar programs read this format. Check the revision marked on the PCB, since numerous V330 revisions exist with differing layouts.
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 @laptexdna. Enginerys does not host this file.
How to open a .cad file
GenCAD text export, the usual format for Compal, Quanta, Wistron and Dell / HP / Lenovo laptop boards.