If you have only one copy of your data on the planet, it's as good as nothing. The day that computer dies or gets a nasty virus, your data dies with it. Create copies of your files. A 1TB hard drive (1,000 GB) costs around $70. If your house burns down or floods, it's a different story. Online services charge around $60/year (Crashplan or Backblaze). Get a 1TB hard drive and an online backup. Now. And sleep tight.
