Boardview in BRD format tagged Lenovo, with the short name GC2 the only identifier given, so the exact model is not stated. The 296 KB layout shows component positions and net connections, useful for locating parts, following power lines and checking connections around a suspected short. BRD files open in boardview tools such as OpenBoardView. Since the name is minimal, compare the board code printed on your PCB and the component layout against the file before trusting any measurements or part locations.
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 @boardviews. Enginerys does not host this file.
How to open a .brd file
The most common boardview extension. Several unrelated formats share it, which is why one viewer opens a .brd and another refuses it.