Paolo, You have to submit the whole zip file to JLC PCB, not individual files. I would not recommend getting this board; at least not the one that is linked above. The file has issues with some of the component slots being the wrong orientation. I ordered 5 of these from JLC but as designed and manufactured the DC jack and the stereo 3.5mm TRS components won’t fit because of the issue. The DC/DC buck converter also doesn’t quite line up but without knowing exactly which one Theo designed for I don’t know if the issue is the board or the buck converter I got. Cheers!