Network storage is usually network attached storage, i.e. a network of several computers is expanded with a special computer that acts as data storage for the entire company. This increases the storage efficiency, because the data does not have to be saved multiple times on each individual computer. It increases productivity because the users of the network can always access the latest version of the data in the storage computer instead of exchanging information about who has the latest version on their computer. Network storage also increases the security of the data, because now only a central unit needs to be secured against data theft by special programs. A network area storage, or storage area network, offers a network of storage computers that can be controlled from other networks. The network area storage presents itself to the user as a block, i.e. the individual units within the area storage cannot be controlled individually, but only the storage network as a whole, which then provides the desired data. The advantage is that the storage area network can be expanded as required without presenting itself to the user as a complicated network. As a result, each file can be accessed in different ways, so that maintenance work, the exchange of components and the expansion of the network can be carried out without switching off the storage area network or impairing its work.