A freemium model of course is needed if the whole thing should be successful. About filtering the content... well, that is an interesting topic... how Dropbox ant its competitors deal with that?
They use hashes of known material, and in some cases, image recognition technology for more detailed review.
Files that are shared receive more attention. This helps since most files on Dropbox aren't shared. A file-sharing application would not be able to use that filter, obviously.
Files that are shared receive more attention. This helps since most files on Dropbox aren't shared. A file-sharing application would not be able to use that filter, obviously.