title: Most efficient way to copy data to multiple USB drives in OS X
body: <p>I have a need to duplicate about 10 USB thumb drives a day from a Dropbox folder that changes slightly each day (about 10GB of data). I considered the $300 "Aleratec 1:10 USB 3.0 Copy Cruiser" but upon study, realized it's no more than a USB 3.0 hub and some basic copying software. I can do this with my own USB 3.0 hub and Terminal in OS X! (Windows 10 is also available if there's an easier way.)</p>
  
  <p>Question: Since the bus is faster than my drives, is there a way I can execute this command to write to all the drives simultaneously? Or any other creative suggestions appreciated. Thanks.</p>