OneDrive is a disaster to use. App is VERY buggy, doesn't update how much storage I have after files are deleted, says it can't delete files in general half the time. Trying to unsync your phone's gallery is a much harder process than it should be especially when the app just won't let you download folders from OneDrive directly to your phone. So if you unsync it with your gallery, everything it decided to sync will just be taken off unless you download each file one at a time. Ridiculous.