You should do this even if you use Dropbox or some other service provider. There’s still data loss potential. Google has lost entire Gmail accounts for example.

You should do this even if you use Dropbox or some other service provider. There’s still data loss potential. Google has lost entire Gmail accounts for example. The durability isn’t 100% after all… those extra .9’s aren’t to cover durability issues in the architecture, they’re to cover “oopsies” where the provider loses your stuff.