They are CDRs. Yes, I always close them at the end of the burn... perhaps a bad batch.... After problems encountered about a year ago, I started burning them on my system, then takine the CD and try it on another...to make sure it works....if it does, it goes into my storage folder... They are safely tucked away... this CD has a label on it, not written on with felt tip pen or anything.... I also have a hard drive backup now...but had a HD failure about 6 months ago as well... It seems to me redundant backup is a must...CDs, hard drive, and maybe more CDs...there's hopefully one of them will make it for about 5 years...after that it probably doesn't matter all that mush as all things are changing so fast....

Humankind has not woven the web of life. We are but one thread within it.
Whatever we do to the web, we do to ourselves. All things are bound together.
All things connect......Chief Seattle, 1854