http://protonmailrmez3lotccipshtkleegetolb73fuirgj7r4o4vfu7ozyd.onion/blog/centalized-vs-p2p-protondrive
Learn more about end-to-end encryption End-to-end encryption is a key differentiator between Proton Drive and most other centralized services. Unlike Google, Dropbox, Microsoft, or Apple, we simply can’t access and hand over (new window) your files. One advantage of P2P systems is that their decentralized nature means there is no centralized server to break into or otherwise compromise.