Hey, got the exact same problem. Running Sync (1.4.75 / 1.4.38) on: Windows 7 64bit (local network) Debian 32bit (local network) Ubuntu 64bit (wan) OS X 10.9.4 (local network) Android 4.4.4 I've tried sync with all machines and with only one Machine enabeld, but sync freezes after about 5 minutes. Only reboot helps here. I have different folders between 2 MB and 4 GB. The all seem to synced complete, even the apps says "not in sync". Only my photo folder (13 GB / 4000 Files about 3 MB) can't complete. I would like to provide additional information too, any log or debug information? Regards, Rapha