As the prevalence of home networks increases, so does the need for network-attached storage (NAS) devices. These hard drives can be accessed from any device on the home network, serving as a central repository for multimedia and other shared content. You'll generally have to pay a premium for external storage with network access, but that's not the case with these three devices.
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*Source: PC Magazine (
http://www.pcmag.com/article2/0,2817,2319805,00.asp)*
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