Nextar NST-310S3 external HDD enclosure & Drive dock D300S3 clearly state that they support superspeed USB3.
This is not entirely true, these devices only supports USB 2 if plugged into ANY WIN8 computer.They are OS specific..work OK in WIN7 computers but not in any running WIN8 regardless of manufacturer.
There is no warning on the box to suggest this, also there is no firmware update available on their website....none since 2010!!!
So if you buy one of these enclosures...or their USB3 dock for that matter do not expect USB 3 support...transfer times will be super slow when forced back into USB2 mode.Buy at your own risk...I would not recommend it.
Review about: External Hard Disk Drive.