I've just purchased a second HD for my G5. The primary purpose of this drive is to serve as a backup for my existing drive. Both drives are identical models. As I see it, I have a few options. 1.

Drobo made external storage devices that bundled hard drives into an easy, set-it-and-forget-it RAID configuration for people ...

Network-attached storage is the most versatile way to store data, but that's just one of the many benefits of a NAS device.