How can I allow a team member to move documents from one file to another BUT NOT allow them to download it?

Question

I have a small number of team members who I wish to be able to move documents saved in one file to another file where 100's of members will have immediate access in a short space of time. The problem I find is that if I give members the ability to move documents between files it also gives them the ability to download the file which I cannot have. Both myself and my IT team at work cannot seem to find a way to have a member;

1. No edit
2. No download
3. Be able to move a document from one file to another within the channel.

Please, is this possible or am I trying to find something that cannot happen?

Thankyou in advance for your time.