Seems the issue is what you can back up on the phone and where
Apple nevertheless arbitrarily requires that its mobile device holders use iCloud to back up certain file types—mainly, device settings as well as apps and apps data (“Restricted Files”). With respect to other file types—e.g., photos and videos (“Accessible Files”)—Apple mobile device holders can select from other cloud-based storage providers servicing the market, including Google Drive, Sync.com, pCloud, and others.