I plan to teach an online course. Students should be able to drop assignments that I only can access (into their "personal" folder). So, I must be able to setup personal folders that allow this kind of access. I should also be able to drop files into a student's personal folder that they only can access. There will be no team work.
What level of service will allow me to do this? Am I correct to assume that Plus is not sufficient? If that is true, then is Professional sufficient?