Bitdefender Total Security 2019 reads all my hard drives except C: about once a second.  This started after an update since September 1, 2018.  Is this necessary or a bug? 
	The constantly blinking lights on the hard drives is very distracting.  I have not noticed any affect on performance.
	I restored my drives to August.  The problem went away until Bitdefender required rebooting the computer.