Public online repository connected as a network drive?

Question

Data storage

My community (about 1000 potential users) needs to organize a 100 gigabyte cloud repository. The main feature is that it should be connected as a network drive, just like in DiskO, without downloading anything to the end user's local machine until required.
Unregistered users should have read-only access, registered users should have write access to one of the folders, admins should have full access.
Available solutions such as the same Mail.ru cloud are not satisfied with the fact that access must be given to the administrator, entering each separately, there is no access sharing, there is no access without authorization.
Cor. Google clouds are expensive, there is a fee for each user, there is no unconditional access, etc., etc. FTP is not yet connected as a network drive and working with it is not fast, which will not give speed as in normal cloud solutions.
What should you pay attention to with such requirements?