How to work around common BitTorrent Sync 2.0 annoyances

BitTorrent Sync’s big new feature doesn’t exactly work. Yet.


If you get the “foldererror110” error in the desktop client:

  1. Ensure you’re using the latest build of the desktop client (2.0.85 at this writing).
  2. Click the options button (which looks like a vertical “…” on mouseover) for the corresponding folder.
  3. Click Disconnect as shown in Figure 1 below:

    BitTorrent Sync doesn't hide its complexity from its users, which is a good thing.
    Figure 1: BitTorrent Sync doesn’t hide its complexity from its users, which is a good thing.
  4. After the folder disconnects, click the options button again.
  5. Click Connect.
  6. Specify the folder path as the same the path you used for that folder previously. Your folder should reconnect without an error.

If you get “unknown error 110,” “Cannot identify the destination folder,” or cannot connect folders from a pre-existing identity in the Android client:

Solutions to this bug in particular are rapidly evolving; see this thread first just in case there’s a better fix than what follows. Basically Android client syncing using a pre-existing identity is broken; you’ll have to create a separate identity for the device.

  1. Clear the app’s data.
  2. Restart the app, but this time create a separate identity for your Android device.
  3. Open the Sync hamburger (sidebar) menu.
  4. Tap Settings.
  5. Tap Advanced.
  6. Uncheck Simple mode.
  7. Tap Default folder destination.
  8. Navigate to the parent folder of the folder you want to sync.
  9. Tap Choose folder. (You’ll have to repeat steps 7 to 9 for folders that have different parent(s) from this one).
  10. Return to the main Sync window.
  11. On a desktop device to which said folder is already synced, click the Share button as shown in Figure 1.
  12. In the ensuing pop-up, set your desired Permission and Security options. Unless you’re syncing to a mobile device that isn’t yours, I suggest unchecking the I invite must be approved by me. option as forum posts suggest it can fail due to poor connectivity (though exactly how connectivity can be poor despite successful syncs make no sense to me).
  13. Click QR code.
  14. On the Android device, tap the floating “+” button.
  15. Tap Add a folder.
  16. Read the above QR code using the reader window that appeared in Step 5 above. Note that the path displayed is the same as the one selected in Step 9 above.
  17. Tap Choose folder.
  18. Tap Add folder. Your folder’s status will change to Pending.
  19. When the Pending status clears, tap the options button again.
  20. Tap the folder settings (the vertical “…”) icon.
  21. Tap Details.
  22. Assuming you were previously syncing all files, enable the Sync all option.

If you get a “Cannot identify the destination folder” error in the Android client after using the above method:

  1. Repeating Steps 20 and 21 above for the problematic folder.
  2. Tap Disconnect.
  3. Tap Disconnect again to confirm.
  4. If you don’t have one already, download and install a file manager than enables you to see hidden files. The best option for most people is ES File Explorer.
  5. In ES File Explorer, tap the hamburger menu.
  6. Tap Settings.
  7. Tap Display Settings.
  8. Check Show hidden files.
  9. Exit Settings and navigate to the problematic folder.
  10. Within that folder, select and delete the .sync folder.
  11. Return to the Android client and repeat Steps 11 to 22 above. The “Cannot identify the destination folder” error should be gone.

Author: jdrch

ISTJ, Rice Owl, UF Gator, mechanical engineer. STEM, sports, music, movies, humor. Account mine only & unaffiliated.

4 thoughts on “How to work around common BitTorrent Sync 2.0 annoyances”

    1. 2 questions: 1) In which client are you getting the error? 2) Did said folder (or the source thereof) exist on any of your devices before?


      1. It’s a Debian system using the webui.

        The folder did not exist. I had btsync create it. I confirmed that it was created and even chmod it 777 to make sure. But it still will not let me add it.


        1. That’s really odd, but TBH I have no idea how or why it’s happening. Try the support forums or file a bug. They’re pretty responsive on the latter.



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