The New York Times has put together a guide helping you find the best NAS storage servers for your need:
“… [a] NAS provides a central hard drive on which you can store, share and back up all files from multiple computers in the household. The NAS drive connects via an Ethernet cable to a wireless home-network router, which enables laptops and other devices equipped with Wi-Fi networking to use the drive wirelessly.
Unlike an external hard drive, an NAS device has a processor and uses its own operating system for storing and sharing photos, music, video and personal files.
Makers of NAS devices say home users primarily use the drives for data backup; centralized storage and file sharing among multiple computers; and remote access to photos, video, music and other files.
Most NAS drives enable families to create one consolidated library of photos, videos and digital music that can be streamed to high-definition TVs and other networked devices in the home. To do so, you will need a digital media adapter or a game console like the Xbox 360 or PlayStation 3 that connects to the TV.
NAS drives also have software that can be set to automatically back up every computer on the network. The software enables you to select files, folders and drives to back up, as well as designate the time and day of the week for automatic backups. You will need to install the software on each computer on the network.
A more sophisticated NAS device contains two hard drives and automatically maintains identical copies of data on each drive to help ensure foolproof data storage. The beauty of this setup, known as mirroring or RAID 1, is that if one hard drive fails, the information will be safe on the other one.”
For the shopping tips: A Guide to Network-Attached Storage Devices for Backup