Step-by-step: Custom firmware (Marlin) via SD card / binary flash Note: Exact details depend on your mainboard MCU (e.g., STM32, ATmega) and bootloader presence. Many Qidi boards use an STM32 MCU and require either a specially built .bin placed on SD card or flashing via USB/DFU or ST-Link.
Some X-Plus models allow firmware updates directly via USB from (based on Cura): qidi xplus firmware install
: If you are on Windows, ensure you fully extract the .rar or .zip file before moving folders to the USB; Windows Defender may sometimes flag these files, so you may need to briefly disable it. Qidi x-plus 3 firmware upgrade guide Step-by-step: Custom firmware (Marlin) via SD card /