When looking at price tags, you often compare NAS with Wi-Fi routers, USB devices, or other network components. But the fact is that these devices are not comparable with each other. NAS contains a processor, memory, NIC, and software for the best performance from HDDs. On the other hand, the router is just a small processor. The minimum software to do the routing action and USB is direct access storage. Also, the speed of a NAS is much faster than a DAS. All these advantages make the NAS enclosure more expensive than other computer parts, and the reason explained says a lot.