As the subject title states I've noticed that every time I conduct a backup from my 6 plus to my iMac from iTunes I receive this pop up message from iTunes telling me I have purchases that have not been stored in my iTunes library and would I like to transfer them. The catch is this pop up message is occurring everytime I click on backup even after I've already accepted the request. Would I have apps on my phone that are just not syncing hence the re-occurring message? The only problem with that is I don't know what apps if any it is wanting to transfer/sync? This message is not occurring on my iPad or my wife's devices only my iPhone 6 plus.