Question: how to transfer all data from iphone 5 to iphone 7 plus?
Answer: Select the most recent backup you just made from the restore menu in iTunes, then click "Continue". Wait, and when the transfer is finished the iPhone 7 will reboot itself and everything from the old iPhone 4/4s, 5/5s/5c, 6/6s or iPhone SE will be on the new one and ready to go.