I agree with Dan Misener. He wrote this excellent article on why backing up your digital memories matters. Here is an excerpt:
Backups matter. From precious family photos to your most important digital documents, it's important to have reliable backups of your digital life.
The flooding in Southern Alberta has been a good reminder of that. We don't yet know the full extent of the damage, but in addition to the lives, homes, and physical possessions that have been lost, the floods will undoubtedly have claimed a good number of digital possessions, too.