Will 2.0 USB Drive Work in 3.0 Port

The USB 3 port is backwards compatible and if you put a USB 2 device into it the port doesn't get "stuck" forever. It doesn't bother the drive either. That said, I know that there are USB chipsets that don't totally follow the USB specifications so it is possible you might come across a USB 2 device that won't work in a USB 3 port. However I'm in tech and I've yet to come across one that won't.

As I said, I've not come across any USB 2 drives/enclosures that won't work when connected to a USB 3 port. This includes name brands and even generic no-names and where I work we've come across a lot of both. That said, I personally tend to purchase Icy Dock or OWC's own branded enclosures along with quality drives appropriate for the task. I do occasionally pick up something at a big box store and then I stick with name brands but I do avoid Western Digital enclosures because they tend to use proprietary technology. (It often isn't possible to open their enclosure to swap out the drive or use the drive in another enclosure.)

2.0 USB drives will work in a USB 3 port, however the speeds will be limited to USB 2 speeds. All USB 3 ports should be backward compatible with USB 2 devices but at USB 2 speed.