I went to millenniata.com and find that I made some errors in my post concerning their discs. The coating on regular DVDs is an organic dye which begins to deteriorate as soon as it is engraved. I stated that the millenniata disc was metal. That is wrong. The website states that data is engraved into a inorganic "rock-like" layer. The DVDs require a special writer.
They also make a blu-ray disc. Some regular blu-ray drives can burn the M-Disc blu-rays. If you are going to buy a drive or writer, there are some that can burn and play both blu-ray and DVD.
I do not have a blu-ray player or drive, and no very little about them except that they can hold about 5 times as much data as a DVD. Before you buy a drive, go to the millenniata website and read all about it so you will be sure and get the right kind. I am really interested in this technology, and since I have a lot of photos and other family history data to store I am trying to find out what I can about it.
Hope this corrects any wrong impressions that I made with my last post.
Peggie