"There are purchased items on the iphone that have not been transferred to your Itunes Library"
"There are purchased items on the iphone that have not been transferred to your Itunes Library.
You should these items to your Itunes library before updating this iphone. Are you sure you want to continue"
Getting message above when trying to update iphone software using Itunes on laptop.
Laptop is authorised and have done File>Devices>Transfer purchases from iphone, several times.
Transfer only takes seconds like it actually is not happening.
Itunes is up to date.
Any ideas?
iPhone 7, iOS 11.2.2