Network Attached Storage (NAS) boxes are very common to add shared storage to a small business network infrastructure. While providing an inexpensive and convenient way to store extra data, there are some common pitfalls to avoid if you choose to use conventional NAS drives or appliances for your backup. Highly Reliable Systems makes specialized backup NAS appliances and Directly Attached Storage (DAS) devices. Each has a place. In this overview we outline Pros and Cons of conventional NAS, NAS for backup, and DAS.