Before starting, identify your exact printer model, as firmware for an original X-Plus will not work on an X-Plus 3.
If you have custom printer.cfg modifications in Fluidd, back them up before proceeding. Installation Steps qidi xplus firmware install
If your printer is connected to Wi-Fi, this is the easiest method. On the touchscreen, open the Check for Updates Before starting, identify your exact printer model, as
Turn off your QIDI X-Plus using the physical power switch. identify your exact printer model