An operating secure offsite backup solution is a simple technology that will almost certainly save your critical business data in case of an onsite disaster. The way it works is an image copy of your data is stored on a local drive onsite and a copy of that data is also stored offsite in a highly secure data centre. Each day any changes in the data is synced from the onsite copy to the offsite copy over an encrypted internet connection.
If you suffer a complete data loss from a natural disaster to a nasty virus encryption you have the option to restore from your offsite backup.