Keep a backup of your cloud data

Just because your data is in the cloud doesn’t mean it’s completely safe. Cloud providers experience outages and data loss just like the rest of us. Besides the technical risks your data faces, you could also lose data due to the cloud provider’s usage policy. If you violate their policy (or in this case they think you violated it) they can lock your account, leaving you temporarily or permanently unable to access your data.

http://www.zdnet.com/blog/hardware/why-you-shouldnt-trust-google-or-any-cloud-service-with-your-data/13860