give an option to use own OneDrive to store pictures
To use an own storage such as OneDrive gives additional security / privacy as pics are not stored on any 3rd party storage. Also, this could be uses to keep them "forever" or very long time. Of course, premium feature costs credits...
Thank you very much for your suggestion! We are already thinking about how we could implement additional storage services, such as OneDrive, DropBox, etc. to offer the user additional options and increase his privacy.