Since iCloud only provides 5GB free storage space for you to store backup. For most users it isn't nearly enough. The lack of storage space required you to clean unused data out as often. Luckily you can delete documents and data stored in any app right from your iPhone or iPad, even if you saved it in a Mac app.
How to clear out unused documents and data in iCloud to free up storage space
1. Launch the Settings app on your iPhone or iPad.
2. Scroll down and tap on iCloud.
3. Choose Storage & Backup.
4. Tap on Manage Storage.
5. Under the Documents & Data section tap on an app you'd like to view what documents are being stored in iCloud.
6. Tap on the Edit button in the upper right hand corner.
7. Tap on the iDelete button to the left of the item to delete it and then tap again on the right to delete it.
8. A popup menu will come up confirming the delete one last time, tap on Delete to confirm.
9. Alternately, you can tap the Edit button and scroll to the very bottom and choose Delete All to remove all files stored by a specific app. This is handy for apps you may not even have installed or use anymore.
That's all there is to it! Besides, Recently the leak of celebrities’ photo reminder iPhone user to strengthen iCloud safety or delete photos from iCloud to protect private photo from leaking.
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