If you have a box from a drive manufacturer with foam rubber inserts that the drive fits into, this is the optimum way to ship your drive. If not, the next best way is to first seal the drive in an anti-static bag. Then wrap it up in plastic bubble wrap, going around the drive 4 to 5 times and secure it with tape so the drive does not slip out of the plastic. Tape all the drives together so that they cannot make contact with each other. Place in a box that gives you at least 6 inches of clearance. Fill the box with popcorn or bubble wrap. Make sure there isn’t any kind of shaking and the drives are secure.