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I think that I know the answer to this question, but I am going to ask it anyway. I know what the benefits in speed are for devices that utilize the USB 3.0 spec. I know about its backward compatibility.

What I want to know is this: are there any common consumer-level devices that REQUIRE a USB 3.0 connection

In other words are there any usb 3.0 devices that when plugged into a usb 2.0 port will not work as intended or will not work at all.

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why not? usb3 is not so expensive today and there are many devices that use just usb3 – Daniel Ruf Nov 29 '11 at 14:12
Consider an enterprise that would need to replace more than one computer... – Buggabill Nov 29 '11 at 14:34
Speed is the only benefit. – Casey Robinson Nov 29 '11 at 15:09
also usb3.0 is downwards compatible to 2.0 what do you need exactly? THERE is indeed hardware for normal consumers – Daniel Ruf Nov 29 '11 at 15:40
your question needs some work – Daniel Ruf Nov 29 '11 at 15:40
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closed as not constructive by slhck, techie007, random♦ Nov 29 '11 at 15:37

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Yes, there are already many of them like portable harddisks for example Sharkoon QuickStore portable USB3.0

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USB 3 is not required for this device. It will use it if it is available, though. From the data sheet: External interface: Micro USB3.0 (compatible to USB2.0 and USB1.x) – Buggabill Nov 29 '11 at 14:34
usb3.0 is indeed need for these drives but usb3.0 is downward compatible to usb2.0 see en.wikipedia.org/wiki/USB#USB_3.0 – Daniel Ruf Nov 29 '11 at 15:00
it was also just an example – Daniel Ruf Nov 29 '11 at 15:01
No. There are no devices that I know of that will fail to work if they are not plugged into a USB 3 port - including this one. – Buggabill Nov 29 '11 at 15:32
why should you want usb3 devices that dont work with usb2? they are downwards compatible to usb2.0 generally – Daniel Ruf Nov 29 '11 at 15:42
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