yes but it would be easier to plug in the droid 2 via USB to a computer then put the music on the desktop then plug in the charge and drag the music to it
or maybe switch SD cards?
Sorry not sure on the blue tooth, i would think that you can. but otherwise use a pc and hook both up via usb and drag and drop files to and from. if you don't have a pc, borrow one, you won't need it for more than a half hour to transfer a lot of data.