I usually develop files in Ubuntu and sometimes need to synchronize files with other machines. Ubuntu one is a good solution. I am in Ubuntu 13.10 (64bit) and Windows 7 (64bit).
It was quite helpful at first, but then I lost a folder directly in the synchronization folder under windows, and I didn't know how to get stuck in the middle, so I can no longer synchronize it. It is useless to uninstall and reinstall. Basically, it is in the "file sync starting" status when it is started.
The solution is to go to the configuration folder of ubuntu one and delete the files generated by the synchronization error, so that Ubuntu one can start synchronization again.
In Windows 7 (64bit), follow these steps:
1. Exit Ubuntu one, including disabling Ubuntu-one related processes in the task manager.
2. Go to the personal folder \ appdata \ Local \ xdg \ ubuntuone \ syncdaemon \ trcask and delete all files.
3. Restart the Ubuntu one client. Generally, you will be prompted to merge the synchronization folders on the local and server. Just agree.