The front portion of the KF-25 includes a 4-port USB HUB Tray and 2.5" HDD
Tray. These pocket sized devices can be used right at home within the Data
Dock, or on their own with a USB cable. Each of the stainless steel trays is
clearly labeled HUB or Hard Drive. The back tray's include a USB port for
stand alone external use, or to interface with the KF-25 when docked