l can't seem to back-up my Iphone on my Mac.
I used to be able to quite easily using ITunes - back up my IPhone. It doesn't matter what I do - restart both devices etc etc still the IPhone is not visible under devices on ITunes. It's making me crazy. I used to get the "Trust this Computer" query but now I don't even get that. I would prefer to back up my IPhone on my Mac rather than be extorted into paying for ICloud storage. Please help. I'm running MAC OS High Sierra Version 10. 13. 6 on my mac and my IPhone 8 is running IOS 13.5.1
iPhone 8, iOS 13