Theres an easier way. instead of backing up a charachter, back up a world.I also know a duplication glitch that allow anyone to duplicate any item with a few steps
- Get your main charater and get any item and put it in your inventory
- Log out and go to the character list and choose the character with the item you choose but don't log in to the world yet
- Press the option button on the right tab of the character and press "backup" then press "to local" that will cloned the character you choose which has the same items as the character
- Log in to the world with the clone which is different than the main character because there a number on the character name
- Put the item in a chest (Warning: don't put any item in a piggy bank and the safe while the cloned character is in used) and after you place the item in the chest log out of the world and delete the numbered clone character
- Log in to your main character and receive the duplicated item