When I have bought DVD's in the past I have always gotten the cheapest and never had a problem with them
When I started with dvds, I also bought the least expensive.
When I went to play them in the future, many had degraded.
I then started using Taiyo Yuden https://www.google.com/search?q=taiy...ient=firefox-a
They are probably the best on the market and not much more expensive than the "cheapies". FWIW
Also agree with WHS - external hdd is best for backup image.
Just wanted to add - You can get a portable external - 500gb for $50,00 (no need to plug into an outlet, for the same price as a 30 gb flash) http://www.amazon.com/External-Hard-...F8&node=595048