You use a mixture of contradictory terms, and that's probably just inadvertent, but let's make sure.
E09 is the older original model Classmate from 2010.
You have an E11, the newer Classmate from 2011 & 2012.
The USB procedure is really only for E09 restore sticks, not for E11.
Your symptoms don't match the problem the USB procedure was meant to solve, which was a failure to boot from the restore stick at all. Although the Copy should work, that it doesn't is only a distraction from your real problem, and wouldn't make a difference to you if it did succeed.
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It sounds like a file(s) on your restore stick might be corrupted.
The solutions for that is to 1) borrow another from a nearby team, or 2) request a replacement from
frcteams@usfirst.org