In today's review, I am taking a look at a mechanical hard disk, but it isn't one that is intended for your desktop system. Western Digital created their Purple line of hard disk drives to be the perfect choice for digital video recording, network video recording, and surveillance systems. On the test bench today is the 6TB version of this WD Purple surveillance hard disk.

All hard disk drives may look the same on the outside, but there is a big difference in what is inside and how it works. That is also the main reason that you should pick a drive suited for the task at hand and not just any random drive of the shelve. As WD puts it: ?You wouldn't use a bicycle to transport cargo across the country because it is not the right tool for the job.?