My concern too and the reason why I think it'll never truly work. IF someone can proof that you stored child pornography on your system then good luck fighting

My concern too and the reason why I think it'll never truly work. IF someone can proof that you stored child pornography on your system then good luck fighting that. Professional storage providers have legal departments that very carefully design systems in a way to avoid any responsibility. Also, those are limited liability companies and companies can't go to jail. As a private individual, I'd never offer to store anyone's data.