How to pack a hard drive
Solution 1:
Wrap some rubber bands around it and then put it in a sock and then wrap it in a towel. You may want to destatic the towel and sock using this method
Make sure you secure it (like in the dashboard compartment). And don't crash.
Solution 2:
Wrapping it in newspaper or bubble-wrap inside a box should be fine.
Solution 3:
If you wrap the drive and then cushion it in a briefcase and store it so it can't slide off the seat it should be fine.
For further travel arrangements you may consider the Fortress Ultra-Rugged Hard Drive:
Safeguard your data from a drop-height of 7 feet onto concrete!
Something I must get myself now after the '"Big Freeze" in Ireland!