System appended capacity (NAS) is a document level PC information stockpiling server associated with a PC arrange giving information access to a heterogeneous gathering of customers. NAS is particular for serving documents either by its equipment, programming, or design. Usually made as a PC machine – a reason constructed specific computer. NAS frameworks are organized apparatuses which contain at least one stockpiling drives, frequently orchestrated into consistent, repetitive capacity compartments or RAID. System joined capacity expels the duty of record serving from different servers on the system.