My phone hasn't backed up in weeks because my iCloud storage is full. Can I delete the old backup so there's room for a new one?
To delete an iPhone backup from iCloud, follow these steps:
On Your iPhone or iPad
On a Mac
On a Windows PC
If you want to back up iPhone without iCloud, there is a better choice - EaseUS MobiMover. It is a professional iPhone data manager that can back up your iPhone in one click and store the backup file on your computer without using your iCloud space. More importantly, it will not overwrite your data.
Related Article: How to Delete Old Backups on iCloud from iPhone/iPad/Mac/Windows
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