9 reasons why your iPhone won't backup to iCloud and how to fix them
CheckyouriCloudstorage.InsufficientiCloudstorageisoneofthemostcommonreasonsforafailedbackup.EveryiPhoneusergets5GBof ...,RemoveappsfromiCloudbackups.TomakespacefromiOSapps,gotoSettings→[yourname]→iCloud→ManageStorage→Backups→[yourdevice].,Checkif...。參考影片的文章的如下: