Hi Lin,

Thanks for contacting us and i am truly sorry for the late reply. This is Dorothy and i hope to be able to help you!

If you just want to back up device data, i would like to recommend you to give our AnyTrans a try. It can help you back up device data, photos, music, messages, contacts, etc..

To get ,more info about AnyTrans, please refer to the detailed user guide:

https://www.imobie.com/guide/anytrans/get-started-ios.htm

If there is anything i can help you with, please just let me know.

Enjoy a nice day!

Best regards,

Dorothy