Now you can copy ALL your family tree, including family photographs, and a lot more to one removable disk, similar to a CD or DVD disk.
First, there were CD disks with roughly 600 megabytes of storage. That was followed by DVD disks with roughly 4.7 gigabytes of storage. More recently, Blu-ray disks have become popular with up to 25 gigabytes of storage on one disk. All of those numbers can be doubled with the so-called double-layer disks.
Now, a new technology from TDK delivers disks that will store up to one terabyte of information. If my math is correct, that is the equivalent of 1,667 CD-ROM disks, all stored on one disk that looks a lot like a CD-ROM disk.
The company realized the large capacity by forming 16 recording layers, each of which has a capacity of 32 gigabytes on each side of the disc.
One difference is the thickness of the new disk. It is roughly two-and-a-half times as the thickness of a standard CD, DVD, or Blu-ray disk. However, that probably isn't much of a problem. Any recorder or playback device made for the new disks will simply need to accommodate the thicker disks.
You can read more at http://techon.nikkeibp.co.jp/english/NEWS_EN/20101009/186359/