This is designed to be convenient since it prevents you from having to open iTunes manually.

But there are some good reasons for wanting to disable automatic sync with iTunes.

Connect your iPhone or iPod to your box.

Screenshot of iTunes

iTunes should launch automatically.

If it doesn’t, launch the program.

This takes you to theSummaryscreen.

Screenshot of the iPhone Summary screen in iTunes

In theOptionsbox, uncheck the box next toAutomatically sync when this iPhone is connected.

ClickApplyin the bottom right corner of iTunes to stash your new setting.

From now on, your iPhone or iPod will not auto-sync when you connect it.

Screenshot of iPhone syncing options in iTunes

Before you plug the iPhone or iPod into the computer, open iTunes.

initiate the Preferences window.

In the pop-up window, click theDevicestab.

Look for the checkbox labeledPrevent iPods, iPhones, and iPads from syncing automatically.Click that checkbox.

ClickOKat the bottom of the window to stash your changes and terminate the window.

Auto-sync is now disabled.

Quit iTunes and plug your iPod or iPhone into the computer and nothing should happen.

That means you have to ensure you remember to sync manually from now on.

If you don’t have a good backup, you’ll lose important information, like Contacts andPhotos.

Get in the habit of regularly syncing your gadget and you should be fine.

you’ve got the option to also set your iPhone to automatically back up to iCloud.

Learn about this option inHow to Backup iPhone to iCloud and iTunes.