Guide: How to sync iPhone without losing data
The iTunes system does not allow us to sync files on iPhone without losing data, so you need a transfer software to make it. This guide will show you how Cucusoft iPhone/iTouch/iPod to Computer Transfer works. Now first you can to download the demo version for try.
Notes: Free Trial Version can only export first 3 files per library for your evaluation every time you use it. If you feel it troublesome and be far from need, you can download and buy the complete version with the Order button.
1: Install and run software
First connect your iPhone to your computer via USB cable. Then install and run Cucusoft iPhone/iTouch/iPod to Computer Transfer. After done, all information about your iPhone, such as type, capacity, version, serial number, and format, will be shown on the main interface as below.
Notes: If program shows you No device found. Do not worry, press the Rescan and scan your iPod touch again until the file list appears.
2: Select menu you want to sync
Open the folder and mark all the files you want to sync from iPhone to computer. For example, if you want to sync music, the following is the information it will shows.

Sync iPhone to computer
Click Export button
then choose Export to Disk Only on the following form. The software will soon begin to sync iPhone to computer without losing data. If you also want to sync the iTunes, chick the other button, then it will modify the automatic synchronization of music/video to manual synchronization between iPhone and iTunes.

A few seconds later, after iPhone sync completed, click OK button. That's all!
If you are still wondering how to sync from iPod to computer, you can also download or purchase the Cucusoft iPhone/iTouch/iPod to Computer Transfer then you will make it. If you have any question in iPod to computer sync, there's the review on it and find some good advice there.
