Do you need to be storing this data forever? I don’t know how your application works, but you could always require some kind of payment from users to be able to

Do you need to be storing this data forever? I don’t know how your application works, but you could always require some kind of payment from users to be able to store a file for more than a week or two. If you don’t need to store data in perpetuity, your storage costs and the overhead of storing that much data should go down significantly.