THE SINGLE BEST STRATEGY TO USE FOR TROUBLE BACKING UP IPHONE TO COMPUTER

Thanks for all your aid but practically nothing labored as I continue to can’t do an iCloud back up. I did every thing you mentioned as well as restored from scratch and the two my iPhone thirteen & iPhone XR at the same time can not backup on the cloud. I also reset my modem but all the things will work on the two iPhones just the ICloud back up