After recently experiencing a hard drive failure with my laptop and losing nearly 3 years of photos and more, I can assure you that is something you do NOT happening to you. (thefashionablehousewife.com)
However, to be clear, this is not a replacement for regular system backups as it will not protect against drive failure. (howtogeek.com)
For many, losing one would be a tragedy, the paper version of a hard drive failure without backup. (treehugger.com)