RAR archive of about 86 KB holding the mechanical drawing for the Orange Pi Lite board, revision 1.1, in AutoCAD DWG format. Expect the board outline, hole coordinates and the positions of connectors and headers, which is what you need when designing a case, mounting plate or a carrier that mates with the GPIO pins. Extract it and open the drawing in AutoCAD, LibreCAD or another DWG-capable viewer. It carries no electrical information, so pair it with the matching schematic when doing actual repair work on the board.
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 @boardview. 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.