This expandable 160GB network-attached storage device is great if you don't need individually password-protected shared folders. The included Wi-Fi access point is a bonus, but not a reason to buy the device if you already have a separate Wi-Fi router.

This business-class network-attached storage device is expensive but offers great features and top performance, plus a simple setup.

The Linksys Storage Link is an economical NAS option.

The Snap Server is a top-notch network-attached storage device that would appeal to both IT professionals and power users. Its security features were noteworthy, but its performance was not.

While the lack of sophistication might not appeal to high-end network administrators, it has direct appeal to people who have smaller networks, but still require network sharing or backup facilities.

The connectivity options and the versatile features of this NAS enclosure make it worth considering if you want to build yourself a high-capacity network to store and back up data. Apart from its ability to conveniently copy data from USB devices and downlaod bit-torrent files, we particularly love how easy it is to create a RAID 1 array using its eSATA and USB 2.0 ports.

Well built and easy to install, the Snap Server 210 is suitable for any small or medium sized business.

If you're looking for a fully-featured NAS device for the home or the office, this one can't be passed over. It's pricey, but you're paying for plenty of functionality that's ready to go once you install a couple of hard disks.

Up to four hard drives can be installed in this NAS enclosure, which is easy to use and quite powerful. It's suitable for a small office environment, but home office users will get good value out of it, too.

The DS207+ is well worth its slightly higher than usual price tag. As long as you aren't planning to move the NAS around, its host of features and connectivity will probably win you over.

This is an efficient and effective NAS system for businesses.