When choosing a method, consider:
Summary table of approaches (features vs best use):
Choose Magic Wormhole if you are comfortable with the command line (or use the GUI app, “Wormhole‑GUI”) and need a secure, ephemeral transfer of a single large file (1–20 GB) between two people who can share a short code via a separate secure channel.
Choose Syncthing if you need to continuously transfer large files (e.g., a researcher moving 50 GB of MRI scans weekly) between your own machines or a small team. It’s the only free tool that handles resuming, delta sync, and no size limits. When choosing a method, consider: Summary table of
Choose OnionShare if your threat model includes an adversary watching your network (ISP, employer, state). Anonymity trumps speed. For files >2 GB, split them into chunks.
Avoid free web‑based tools for any file that, if leaked, would cause real harm. Use them only for convenience with non‑sensitive data.
Many cloud storage services offer free plans with a reasonable amount of storage. Some popular ones include: Or use split-archive + small-cap transfer:
How to:
A. Best simple, secure, free method for nontechnical recipients (≤5 GB)
B. For large one-off files >5 GB, no account, minimal setup B. For large one-off files >
C. For frequent transfers or team collaboration (free, secure)
D. For distributing builds to many users (modders, players)