Add multiple folders to my UbuntuOne Cloud?

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http://askubuntu.com – I wanted to test the UbuntuOne Streaming service but my music folder is much bigger (50GB) than my free capacity. Is there a way to select multiple folders in my music-folder and add them to the sync-list, so that they are uploaded to the cloud? I can only select single folders but thats too much work to fill my 20gb of space do any of you have any ideas? (HowTos)