@hwg315 said in Printing without WiFi:
Am I supposed to put a second SD card with gcode in the PanelDue slot and leave the main SD card in the back of the machine?
Yes. The second SD card doesn't need any system files on it, just files you want to print. Access them on the PanelDue by pressing the button that looks like an SD card on the main screen, then when it shows 'Files on card 0', click on the button that looks like an SD card again to show the files on card 1.
Ian