Comment 2 for bug 365006

I write this provisional solution by if somebody reads this and is in the same situation that I. Although nautilus show us an empty folder drag inside some file of music that wish to add to our mp3 player. When disassemble the unity usb We will be able to confirm that ubuntu has saved the files in the mp3 player without any problem. The surprising is that after this operation and when We going back to connect the unity usb We will see that now, as in Ubuntu 8.10, is recognized like usb mass storage and We will be able to create, erase and explore the unity with all the files that had saved without any problem.

Forgive me if I have done a bad use of the launchpad, I only wanted to help to the people that was in my situation.