Buffalo Technology Turbo USB Utility HD-HSU2 - Manual (Page 4)

Is TurboUSB enabled?
To check whether TurboUSB is enabled, right-click on My Computer and
choose Properties > Hardware > Device Manager > Universal Serial Bus
controllers. If TurboUSB is enabled, your USB storage device will have
“(TurboUSB)” added to its name.
You may also turn TurboUSB off from the same window by clicking Disable
and following the steps. You will have to unplug and reconnect the USB
hard drive to complete disabling TurboUSB. Use the ‘Safely Remove
Hardware’ wizard to release the drive before unplugging it.
When the wizard instructs you to disconnect and then reconnect the USB
cable, click on the ‘Safely Remove Hardware’ icon in the systray and
release the device before unplugging it.