An external data system, typically consisting of a large quantity of hard drives or magnetic tape that is purpose built and connected to computing devices through input/output operations.
Oracle SAN, NAS and TAPE storage options available here.
A cloud service is any resource that is provided over the Internet. The most common cloud service resources are Software as a Service (SaaS), Platform as a Service (PaaS) and Infrastructure as a Service (IaaS).
Oracle PaaS options available here.