I am spring cleaning and I am looking for some free, quick, and easy to use Windows (Vista or Windows 7) software that I can use to wipe about 20 drives before I throw them away.
a gigantic powerful magnet.
I don't understand the motivation here. Is the point to give them away to charity and leave them functional but blank? Just drive a spike through them with a hammer!
OR, borrow a friend's Macintosh and use the built-in Disk Utility. You can select different levels of security and designate the number of times it "zeros" the data out.