Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: Deos this unit power down the hard drive if there is no usage for awhile?
Document: Unit is a drive saver. Power went out on external drive, grabbed this device and switched out, worked great. You hear the hard drive more than inside the external case...but it would make sense to have that happen. Good purchase!
I bought this unit because I had a computer that burned outits power supply and damaged most of the componentswithin the tower. I took a gamble, hoping the hard drivewas intact and bought this unit in lieu of an enclosure.I removed the hard drive from the damaged computer,plugged the unit into a wall socket, put the hard drivein the unit, plugged the USB cord into my new computerand presto all the data was intact. I easily and quicklytransferred it to my new computer's hard drive.I love this product.
Works perfectly. plug in the power, plug in the usb cable, plug in your hard drive. Done. Easy as that.
Used this one time and it worked great to backup a hard drive. Yesterday I plugged it in and no power from the power supply.
Does not have enough power to run (load) the Hard Drive RPM&#8217;S at startup & Connectivity Issues.This happens not all the time but frequently. If you can&#8217;t depend on it, then it doesn&#8217;t work.Keep Looking..
very easy to set up. attach the usb cable to your computer, plug in the power cord to an electrical outlet, insert your hard drive into the docking station, and voila -- a fully functional external hard drive recognized by your computer. highly recommended.
I then have to physically power it off (which I hate doing to a hard drive - high risk of failure doing that) and let it cool down before continuing. If it was just a little bit larger I might have been able to put a liquid cooling block around the drive to work better, but it's too snug for that.
I had an external 500 gb USB2 hard drive that failed. Tested the Power Dongle. Voltage OK, but no monitor light came on the drive casing. Stripped the Drive and plugged into pluggable usb Dock. All my files are secure..Good Job. Thank You.Robert
This is a cool product that holds external hard with the capability to do anything with it. You can use it to view hard drives, copy, fix, delete or just as an external drive. This product does just what it say and a good product to have. The only thing I wish that the power and USB cord were longer.I love this product and would recomend it to anyone.
It's even worse when you try using a laptop hard drive.The power button and cable sockets are all in the back, which means you can't stack these up closely if you have multiple docking stations which is bad design. Also because of the slope of the sides, you can't lay them down or the hard drive will hit the ground surface you put it on and means you can't stack the docks vertically either.
Answer: Right from their website FAQ...LED BehaviorThere is a single green LED on the front dock which will stay green as long as the device is powered and in active standby.During data transfer, the LED will blink rapidly. The green LED should turn off to indicate that the dock has powered down after a drive is ejected by the OS, however some USB hubs will cause the drive to stay in powered mode and the light to remain green with the drive powered even though the OS has safely disconnected the volume.A slightly slower blink indicates a sleeping drive. The same slower blink also indicates a faulty power supply- if your dock continues to blink green after waking the PC, turning the power switch on the back off and then back on again should resolve the issue. If you continue to observe a blinking green light after power cycling the dock, email support@plugable.com or post to our forums.