Connecting a used iPhone with iTunes for the first time
When i bought my 5s end of last year i switched it on coming out of the box, without connecting it to iTunes. I started making back-ups to iCloud.
Now i want to connect it to iTunes to make a back-up, but iTunes thinks it's a new device and only proposes me either to restore an old back-up, or to start using the device "as new".
I'm afraid of losing everything chosing that last option, and the last back-up on my iMac must be one of my iPhone 4 so i wouldn't want that either.
Now how can i make a back-up with iTunes in that case?
iPhone 5s, iOS 7.0.2, space grey 32GB