[dnanian]

I don't really have much information to go on, and if you're not willing to run it again I'm not sure how I'd know what was wrong to fix it.

It's likely it was either copying a large file or a file on your drive was being actively updated while we were copying it. There is a command -- lsof -- that will tell you what's happening... you'd use "sudo lsof | grep SDCopy" to see what's being copied at any given time...