Or to say it in a different way. A digital storage facilty can be a datacenter with many data storage devices. Datacenters are typically used by large corporations or government agencies as either their primary data storage facility or as a Back-up/disaster recovery site.
Due to the sensitive nature of their business they typically have strong physical security, access control, extensive power back-up.
Data centers can come in quite handy but are a bit expensive to build :A S embarassed: