As the title suggests, I can't figure out a way to share a folder outside my home folder using Ubuntu One. When browsing to my work partition using Nautilus, every folder has the "Share" option grayed out.
['https://askubuntu.com/questions/78924', 'https://askubuntu.com', 'https://askubuntu.com/users/39959/']
You could try using a `mount --bind command`. Something like

```
mount --bind /path/to/folder /home/username/folder_to_sync

```

This should make the contents of `/path/to/folder` available in both places.

Ubuntu-one doesn't support symlinks, but it might support binding mounts. If it does work, you can add a line to `/etc/fstab`

```
/path/to/folder /home/username/folder_to_sync    none    bind    0    0

```

That way it will always mount on boot.
There are unsupported ways which will work. Think mount points under ~/

Using a bind mount as described above to a folder under ~/ you can sync any folder on your computer with Ubuntu One. 

I sync folders on a separate partition with Ubuntu One this way. 

Like I said, this is not really supported, but it does work