Take a look at this video from Ebuyer TV and learn how easy it is to wipe your old Hard Drive on both a Mac and PC.
The advantage of wiping a Hard Drive is that it does a far more thorough job than simply erasing each file individually. Wiping the drive and formatting takes the data off in one big swoop, clearing the whole disk for you to start fresh on.
It is worth noting if you have highly sensitive data, wiping a drive is not a ‘total deletion’. Scraps of data will still be left. If you need to totally wipe a drive for security reasons, specialist software and a more complex process is needed.
For most home users the process in the video will be more than enough.