OK. Again, "hang" is different than "crash". So: we need to determine what file is causing the problem.
When it's stuck, please open Terminal. Then, copy the following to the clipboard:
Code:
sudo lsof | grep SDCopy
Paste that into Terminal. Press Return, enter your password (it won't echo) and press Return.
That'll have a list of what we have open. The last two lines are what we're copying (from and to), and should help determine what's really happening here.