If you are transferring files between your own devices (e.g., PC to PC, or Switch to PC via USB), local transfer is best because the data never touches the internet.
| Feature | Magic Wormhole | OnionShare | Syncthing | Web-based (e.g., FreeCroco) | |---------|----------------|------------|-----------|-------------------------------| | | 10–20 GB | ~5 GB | 100+ GB | 2–10 GB | | Transfer speed | Network-limited (relay may bottleneck) | Very slow (Tor) | LAN: fast; WAN: NAT-dependent | Server-limited (often throttled) | | Requires installation | Yes (Python/CLI or GUI) | Yes (GUI/CLI) | Yes (GUI/daemon) | No (browser only) | | Anonymity | No (relay sees IP) | Yes (Tor hides IP) | No (direct peer IP visible) | No (server logs IP unless VPN) | | E2EE | Yes | Yes | Yes | Yes (but JavaScript risks) | | Forward secrecy | Yes | Yes (ephemeral Tor circuits) | Partial (TLS session keys) | No | | Learning curve | Medium (CLI may scare) | Medium (Tor concepts) | High (firewall, device IDs) | Low (drag & drop) | If you are transferring files between your own devices (e