It seems like your computer is having some trouble connecting to the USB. Don't worry, we've seen this before. It's not you, it's the USB.
Try turning it off and on again. No, really, just turn it off, wait 10 seconds, and turn it on again. We're not sure why this works, but it always does.
Or, if that doesn't work, try unplugging the USB and plugging it back in. We've heard this method is 99% effective, but we can't guarantee anything.
If all else fails, call our USB Support Hotline for assistance. We're open 24/7, but only for really desperate users.