I have a Philips GoGear Ariaz 16GB with the following problem: I connected the device to my PC and drag&dropped mp3 files into the folder "Music", as described by the user manual. All worked fine, I was listening to these files for almost a month.
Today I tried to add some new files to the device the same way as previously. However, after disconnecting the device from my PC, it shows only empty folders. So I have neither the music I had previously, nor the new one. When I connect the device to my PC, I still see all the files in the window explorer, SongBird plays the as well. They just dont show up on the mp3 player...

Any ideas?