A data storage device is a device for recording (storing) information (data). A storage device is used in computers to store the data which is one of the core function of modern computers. Recording can be done using virtually any form of energy.
A storage device may hold information, process information, or both. A device that only holds information is a recording medium. Devices that process information (data storage equipment) may either access a separate portable (removable) recording medium or a permanent component to store and retrieve data.
Electronic data storage requires electrical power to store and retrieve that data. Electromagnetic data may be stored in either an analog data or digital data format on a variety of media. This type of data is considered to be electronically encoded data
Network-attached storage (NAS) is a file-level computer data storage server connected to a computer network providing data access to a heterogeneous group of clients. NAS is specialized for serving files either by its hardware, software, or configuration. It is often manufactured as a computer appliance – a purpose-built specialized computer.
NAS systems are networked appliances which contain one or more storage drives , often arranged into logical, redundant storage containers or RAID
Network-attached storage removes the responsibility of file serving from other servers on the network. They typically provide access to files using network file sharing protocols such as NFS, SMB/CIFS, or AFP.
There are also internal storage hard drives for different purposes, Varies in speed, storage capacity, robust and security :
Data Center Hard Dives, Surveillance Hard Drives, NAS Hard Drives etc;
Strategy International is a regional value added distributor with the below Manufacturer