I'm having the exact same problem on my Razr Maxx. Each time I make a Speech-to-Text note, a notification pops up in the notifications bar that says "USB storage device plugged in." At the moment, since I just made five speech-to-text notes, I have five notifications in my notification bar. The worst part is that there is no way to remove the notifications from the notification bar because there's no way to actually "unplug" the phantom USB drive. Force quitting Evernote does not remove the notifications. The only way to remove the notifications from the bar is to turn the phone off and back on. As the previous poster said, this is extremely troublesome and annoying.