[dnanian]

The thing to do, when it gets to this "hang" (which is usually because it's copying a large file, or one that's being actively updated and thus looks *huge*), is to run:

sudo lsof | grep SDCopy

This will give a list of the files we're reading and writing, and the last two lines are the file we're operating on right now. That should help you (and us) figure out exactly what's going on.