Need to free up space
I turn on the Sansa Fuze 8 GB MP3 player and get an error message - "Not enough space for music DB. Please free 90 MB."
I have nothing installed on it and only listen to the radio. However, I turn it on and only receive the error message for 5-10 seconds and it shuts off.
Try reformatting the storage drive or otherwise restoring the device to factory defaults.
Is your memory card installed? I'm not too familiar with that mp3 player, but if it requires a MicroSD card and it's not reading one, it could complain about not having available memory.