Let us examine the hard drive SATA 2.5 "from the laptop.
So it looks like:
View from below:
Turn off the controller (it is held by three screws kind of "star") and remove it.
The controller is a separate screen:
Unscrew the screws, "star" of the top cover and remove it (one was under the label).
Turn off the mount disks and remove them and not only.
This CD was junk. But if you understand working in a normal room environment, the more likely it will become non-functional. Dust will fly in, will begin to appear broken sector ... Inside should be the ideal purity. Perhaps there inside, and air was not, and for example, nitrogen-an inert gas, or helium as a Western Digital.