A Microsoft file hosting and synchronization service.
Unfortunately that's that's the best option available as of today. There's no way for me to sugarcoat this rather than being completely honest with you. It is definitely not ideal.
I am afraid you would have to post feedback, and/or updatevote others, such as this one: https://feedbackportal.microsoft.com/feedback/idea/6cd9fd7c-49db-f011-ad8f-7c1e529694f5
Microsoft does group similar tickets together when they start working on them, and would provide update in the feedback portal.