It seems nice, but I think it should be made more explicit upon downloading, that you can only do that once. I can see myself e.g. downloading a file I received

It seems nice, but I think it should be made more explicit upon downloading, that you can only do that once. I can see myself e.g. downloading a file I received on my phone to take a quick look, intending to then download it again on my computer later. I would be surprised to see it just gone.