i have the auto sync on my iPad for my photo stream. Also have auto backups on. Have added very little to photo stream since iOS update. Now getting message that ipad can't be backed up due to not enough storage. Prior to had 3 Gb of 5 unused. Biggest backup is photo stream . Looks like icloud trying to back up prior photo backups as well? How can I look at what is actually already backed up in iCloud?