As expected, we now have the instructions on how to back up or restore the Note 3 phone. For running the procedure, you must have root access on your Samsung Galaxy Note 3. Also, you need to enable USB debugging on your phone.
1. Extract from the zip and run .bat file. Get the zip for N9005 from here and N900 from here.
2. Is okay to your PC and follow the menu
You will now be able to backup or restore the entire firmware of your phone. Automatic naming of files and backup archive version of the firmware is supported as well. [via xda]