Whenever I click on it, it says "no devices syncing" even though my iTouch (6.1.1) can be plugged in and even be connected wirelessly. So....WHAT OR HOW DO YOU USE THE BUTTON???? Its there for a reason and I can't get it to work.
Maybe this will help:
I think thats just for connecting to wi-fi, not the sync button.
Retrieving data ...