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Just to follow up on my post, this wasn't a compatibility problem with the USB3 port. I was able to get my device to work by connecting it to a powered USB hub. Hopefully that might work for some of you guys using music devices, etc.

Consistent with the theory that Lexar shared with me - anyone know of a powered USB 3.0 hub that runs on batteries?
 
I had a bad start with USB 3 on my 11" MBA too. I'm not sure our problems are related though since mine only show when I use a USB 3 hub. My guess is it's not that the MBA is broken, but it's an issue with Apple's USB 3 driver so I posted it in the peripherals area.

https://forums.macrumors.com/threads/1399179/
 
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