The Backup and Recovery Center displays a list of all recent backups, with their sizes displayed. To delete a backup, click it once and then choose Delete. Look for really ancient, really big backups. Don’t be concerned — you’re only removing the backup, not the actual data.
Google Drive has a backup feature that allows users to back up their data. Data is stored in a private folder within the user’s Google Drive account, which is limited to 25MB per application. The saved media does not count toward the user’s personal Google Drive limit. Only the most recent backup is kept.
The iCloud backup on iPhone is designed to restore the entire device, but it only saves essential data such as iPhone settings and most local information. Your photos, communications, and other app data will be permanently erased if you erase your iCloud backup. You can retrieve them on your iPhone at any time.
The general answer is no—deleting your previous iCloud backup from your old iPhone isn’t harmful and won’t change the data on your real iPhone. In fact, even deleting the backup of your current iPhone will have little effect on what’s actually on it.
Select “Delete a Backup” from the menu. Open the application launcher and go to the Settings icon. scroll down to the Personal section and select “Backup & Reset.” To disable those features, check off Back up My Data and Automatic Restore.
