When my iCloud don’t back up what will I do

i Want to backup my iCloud

Or you want to back up your iPhone to iCloud?

See ⤵️

How to back up your iPhone, iPad, and iPod touch with iCloud

How to back up your iPhone or iPad with iCloud - Apple Support

If you can't back up to iCloud

If you can't back up to iCloud - Apple Support

Hi there,

See this link and follow the instructions provided to see if you can fix the iCloud backup

If you can't back up to iCloud - Apple Support