The problem, historically, with many free/no-registration file sharing services, is that they eventually start being used by 'bad actors' (which differs by coun

The problem, historically, with many free/no-registration file sharing services, is that they eventually start being used by 'bad actors' (which differs by country). The people chasing those bad actors find it easier to target such services and will force a change. Your service will need something to help itself when that situation arises.