iCloud backup
My iCloud won’t back up all the way. It’ll get to a certain point and then it won’t load the rest of it and it’ll just set there until I cancel the backup, how do I fix that?
iPhone XR
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If you can't back up to iCloud or restore from iCloud backup failed - Apple Support
It takes you to an article that starts with "Learn what to do when you need help with an iCloud backup of your iPhone, iPad, or iPod touch"