What's on YOUR Hard Drive?

I am doing some cleaning up and throwing out of stuff around here.  I found two old 3.5" Hard Drives and decided to toss them out.  But you never discard a hard drive that could be recovered by someone - who remembers what kind of stuff you had on a particular drive - purchases from merchants, online banking, personal emails, and so on.  Best practice is to destroy the drive in such a way that it can't be read - so data can't be recovered.  So I unscrewed the cover of this drive, and was going to smash the circular platter with a hammer.  But then I looked at how beautiful the insides of this device are, and I decided to photograph it first.  You are looking at the platter, which spins at either 5,400 or 7,200 RPM.  There is an actuator arm over the platter and on the end of it is the read/write head.  While the disk spins the arm moves back and forth, reading and writing data to the platter.  Now you know how a hard drive works!  You're welcome.