most likely broken. To try to get data off of it I would take it out of the case a hook it up internally to your computer (if it is the enclosure that is broken then you will have a working drive but it is most likely the drive that has broke.). You may also need to do the freezer trick with it where you put it in the freezer for a half hour then hook it up and get what data you can in the short period of time it may work.