BTSync on a Seedbox: Peer-to-Peer File Sync

What BTSync Is

BTSync (rebranded Resilio Sync) is a peer-to-peer file sync tool from the BitTorrent Inc team. Files sync directly between your devices, no cloud middleman, similar architecture to Syncthing.

It's proprietary (closed source), and the free version has had feature limits added over the years. The paid Pro tier removes them.

Should You Use BTSync or Syncthing?

Honest comparison:

• Syncthing. Free, open source, no upgrade nags, fully featured.
• BTSync (Resilio Sync). Free with limits, paid Pro removes them. Slightly nicer mobile apps.

For new setups, Syncthing. BTSync makes sense if you're already a Pro subscriber or you specifically prefer the Resilio mobile experience.

Why Run It on a Seedbox?

Same drivers as any sync tool:

• Always-on peer that other devices sync to
• 10 Gbit upload for big initial syncs
• One-click install
• Same panel as Syncthing if you want both for a transition period
• EU servers in Luxembourg, France, and Netherlands

Installing BTSync

Open the Bytesized Panel, find BTSync in the app catalog, click install. The panel handles the install, the web UI, the URL.

Click "Open" to land on the BTSync dashboard.

First-Run Setup

1. Set the admin login. First-run prompts.
2. Add a folder. Pick a folder under your home directory and BTSync generates a sync key.
3. Share the key with another device. Install BTSync on your phone or laptop, paste the key, the folder syncs.

The sync model is folder-based. Each folder has its own key; you share keys with whichever devices you want included.

Read-Only vs Read-Write Keys

BTSync supports two key types:

• Read-write. Both sides can change files. Default for working folders.
• Read-only. This side can only receive. Useful for backups or distributing files one-way.

Generate the appropriate key per direction.

Common Gotchas

Free version limits. The free tier caps the number of folders you can sync. If you hit it, either trim folders or upgrade to Pro.

Devices not finding each other. BTSync uses BitTorrent-style peer discovery. NATs can interfere; the public tracker fallback usually handles it. Direct port forward for one side speeds things up.

Conflicts piling up. Same as Syncthing, BTSync can create conflict files when both sides edit at once. Clean them up; reasons are usually clock skew or simultaneous saves.

Mobile sync slower than expected. iOS background sync is OS-throttled. Open the app and let it run.

FAQ

Is BTSync free? Free with limits. Pro is around USD 60/year.

Should I use BTSync or Syncthing? Syncthing for new installs. BTSync if you're a Pro subscriber.

Is it encrypted? Yes. End-to-end encryption between devices.

Does Resilio see my files? No. Files don't go through Resilio's servers; they sync directly between your devices. Discovery uses BitTorrent's tracker network.

Will it sync to iOS? Yes. Resilio Sync iOS app exists and works.

Ready to Set It Up?

Browse Appbox plans, install BTSync from the panel. If you don't already have a Pro subscription, install Syncthing instead.