To delete backup data, navigate to Settings > [Your Name] > iCloud > Manage Storage > Backups. To actually delete data, scroll down to the "Advanced" section and click "Manage Your Storage and Backups.
Delete iCloud Data to Free Up Storage Space Completely
Select the device currently backing up and choose "Delete Backup" to remove that specific snapshot. This interface allows you to view storage allocation and delete data that is otherwise difficult to access on smaller screens.
Deleting Data from a Mac Computer Desktop users will find the process on macOS to be more straightforward, thanks to the larger screen real estate and Finder integration. This action deletes the media across all devices linked to your Apple ID.
Delete iCloud Data and Free Up Storage Space Efficiently
Using a desktop browser ensures you can efficiently review every byte of data you are responsible for. iCloud is a remote server solution that syncs specific content like photos, documents, and backups.
More About How to delete icloud data
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