Restore a Previous Firmware — K2 Plus¶

If a firmware update causes issues, you can restore a previous version using the same USB drive installation method.

Finding Previous Firmware¶

Previous K2 Plus firmware versions are available on Creality Cloud:

Download the .img file for the version you want to restore.

Procedure¶

Back up your Klipper config files first — firmware installation does not erase /mnt/UDISK/printer_data/config/, but a factory reset (which you may need to do) will.
```
cp -r /mnt/UDISK/printer_data/config/ /mnt/UDISK/printer_data/config_backup_$(date +%Y%m%d)/
```
Format a USB drive as FAT32 with 4096 allocation size.
Copy the .img file to the root of the USB drive.
Turn on the printer, plug in the USB drive from the home screen.
Accept the upgrade prompt and wait for completion.
After restart, re-enable root access: Settings → Root account information.
Reinstall the helper script and any features you had installed.

Helper Script Restore Tool¶

The helper script also provides a firmware restore option in the Tools Menu → Restore a previous Firmware. This requires an active SSH connection and a firmware file accessible from the printer.