deletingicloudstorage
I had an app called Ulysses classic. I'm not using it anymore, so I want to delete it. I select Delete documents & data under System Preferences → iCloud → Manage, but it didn't work and app remains in the sidebar showing 63 KB (same in my iPhone).
How can I remove it?
Instead of going to Preferences -> General -> Usage, go to Preferences -> iCloud -> Storage & Backup -> Manage Storage.
This screen will list your devices and by selecting the current device (like your iPhone if you're looking at it on your iPhone) you can see the list of applications that saves data to the backup. Here you can see the backup size per app and you can also disable/enable them individually. To modify the settings for your other devices you need to go to the same screen on them.
Try this:
Go to the ~/Library/Mobile Documents folder. Type anything in the search field in your Finder window. Make sure that Mobile Documents is selected in the Search bar, not This Mac.
Next, click on the + icon, and choose Kind is Document. Go back to the search field and erase what you typed. Now all your iCloud documents will display.
Click on Save, and check Add to Sidebar to add this search to your Finder window sidebars.
Note: one submission said to type a period (.), and, while this starts the search, this may not find all your documents if extensions are not visible. So it's best to start a search, then choose Kind is Document and delete the search.
Best Answer
Welcome to AppleSE!
What you are seeing in that image is what is backed up in iCloud. You have to delete the app on iPhone by holding down its icon and then pressing the cross which appears when the icons start wiggling.
Then you'd be able to delete its data from iCloud by going to iPhone settings-> Account (First in the list with your name and photo)-> iCloud-> Manage Storage-> Ulysses classic-> Delete documents and data.