describe one type of secondary devices in detail

Cloud storage is in a cloud computing (cloud computing) extensions on the concept and development of a new concept, as a new network storage technology,  is to point to by cluster application, network technology and distributed file systems, and other functions, the network of a large number of various types of storage devices set up by applying the software to work together, common external provide data storage and business access system.
When the cloud computing system operation and processing is the core of a large amount of data storage and management, cloud computing system will need to configure a large number of storage devices, cloud computing system is transformed into a cloud storage system, so the cloud storage is a data storage and management as the core of the cloud computing system. Simply put, cloud storage is an emerging solution for storing resources in the cloud for people to access. Users can connect to the cloud at any time, anywhere and through any connected device for easy access to data.