sync itunes without backing up

Greetings Flydove,

To clarify, are you needing to sync iTunes content on PC with your devices such as an iPhone, iPad, or iPod? If so, the following info may be able to assist you:

"You can have iTunes sync items automatically (which is the quickest option), or drag items to your device manually (which gives you more control)—or you can do both. You can also remove items from your device automatically or manually.

If you have an iPhone, iPad, or iPod touch with iOS 5 or later, you can sync your device wirelessly when your computer and device are connected to the same Wi-Fi network. If you don’t have a Wi-Fi connection, you need to sync your device using USB.

You can sync multiple devices with your iTunes library, and use different settings for each device.

Important: Before you begin, read the FAQs about syncing—Intro to syncing in iTunes on PC."

You can follow this resource for more details: Sync iTunes content on PC with your devices

Thanks for posting in Apple Support Communities.

All the best!