It have been over 72 hours since I started the Drive Wipe (Zero Out - Wipe Free Space) on a secondary internal drive (HDD) on my MacBook Pro. The drive has about 250GB of free space which is why I am having trouble understanding why it is taking so long. My mistake is that I did not check the options to see how many passes it is doing. This is the first time I have used CCleaner to wipe the free space on this MacBook. So, after more than 72 hours should I just force quit the application? I only selected the one drive. I also made the mistake of leaving an external drive connected. The odd thing is I can't eject it (safely remove it) as I get the message that it is in use by another application.