You may have this problem, every time you plug In your iOS devices like iPod, iPhone or iPad to computer, iTunes will automatically make a backup. This is very annoyed if you already have a backup and you just want to upload a few songs. And this step by step guide will show you how to disable the iTunes auto backups. Let’s start the guide.

Step1. Close iTunes and then launch Terminal, found in /Applications/Utilities/

Step2. Enter the following defaults write command:

defaults write com.apple.iTunes AutomaticDeviceBackupsDisabled -bool true

Step3. Relaunch iTunes for changes to take effect.

 

If you want to re-enable the iTunes auto backup, you can follow these guides

Step1. Close iTunes and then launch Terminal, found in /Applications/Utilities/

Step2. Enter the following defaults write command:

defaults write com.apple.iTunes AutomaticDeviceBackupsDisabled -bool false

Step3. Relaunch iTunes for changes to take effect.

 

That’s all. If you want to know how to transfer iTunes library to another computer, here is a step by step guide for you.

http://www.reviewstown.com/how-to-transfer-itunes-library-to-another-computer.html