Network Attached Storage, or NAS, is a flexible standard solution and is basically just a computer in a network acting solely as a data storage system. The computer is connected via router, switch or directly to other computers and serves as external storage. For this reason, NAS is referred to as network attached storage. The downside is that the data transfer rate is limited to the network connectivity rate. When the load is greater or the files are large, it takes longer until users have access to them. Although the storage capacity can usually be expanded, the computing power is often limited and only allows a certain number of simultaneous users, transactions and operations. On the other hand, a storage server based on a dedicated server offers customized performance and system resources. This helps prevent the kinds of bottlenecks typical of NAS systems.