sentences:  The later version came with 15 or 20gb sized hard drives.Owners of Jukebox Recorder 15's thus may or may not have USB 2.0, a significant concern for prospective buyers; but one can tell if it uses USB 2.0 or not by looking for the line "USB 2.0 Hard Disk" along the bottom of the device.Although discontinued, the Jukebox Recorder with USB 2.0 interface remains in some demand because of the enhanced speed of the USB 2.0 connection (in contrast to USB 1.1), the capability of the device to be flashed with the free and open source Rockbox firmware, the device's recording feature, easy to replace AA-sized NiMH batteries, and its use of easily upgradeable 2.5" standard laptop hard drives.