However, if you have enabled password encryption over iTunes backups, you may fail to backup and restore your iOS devices while using iOS Transfer. Therefore, you need to disable unlock the iTunes backup in the first place.
Unlock your iTunes backups before transfer process
iTunes doesn’t encrypt your backups by default. You need to check the password protection option to enable it. But if you lose or forget the password, there is no way to recover your data or shut down the encryption.
Step 1 Launch iTunes on your computer
Exit the iOS Transfer and run the latest version iTunes on your local computer. After that, connect your iOS device via the supplied USB cable.
Step 2 Turn off encrypt feature on iTunes
Locate to the Summary tab in iTunes. Then browse the Backups section. There you will see “Encrypt iPhone Backup” down below. Uncheck the box in front of it. Enter your password while it promptes.
Now, you can close the iTunes and use iOS Transfer to restore iTunes library to your iOS devices.
Hint What if you can’t remember your password
If you have an iCloud account, you may use iCloud to backup and restore instead. Furthermore, iOS Transfer supports data transfer from iCloud as well as via iTunes.
However, if you have never registered an iCloud account, the only way to turn off encrypted backups is to erase your device and set up as new.