I wouldnt think so! If so, just accessing the drive would cause degradation...Think about it, The read write heads spin over the drive, the data is either bein read or changed...In a format, simply changed. So, doesnt it stand to reason that if formatting (changing data) caused degradation, then wouldnt changing data (moving, deleting, defraggin) do the same? But it doesnt, so I would say formatting doesnt pose any threats to a drive any more then simply using the drive.