“The tough reality is that hard drives are made up of spinning disks, which on the average system spin between 5,000 and 10,000 times per minute. Tiny electromagnetic heads hover over these disks, reading and writing information, constantly. Like a light bulb, there is a MTBF (Mean Time Before Failures) estimate for hard drives. Typically this was around 100,000 hours, but some of the most recent hard drives boast 500,000 of power on hours. This means that on average your drive would last over 57 years if it’s on 24/7, but of course reality is a lot different.”