Any magnetic media is a worse gamble for long term storage than than CDs. A lot of NASA data stored on tape 20 years ago is gone. Tapes are a plastic medium and deteriorate over time. Magnetic media is subject to magnetic disruptions and the inherent deterioration of the media it's on. Hard drives crash and destroy some of the data on them. A recovery service, for hundreds of dollars, can recover the undamaged data, but can't do much about the bits that were physically scratched out of existence. I can't remember the exact figures, but magnetic media is considered to have a life of about twenty years and optical about a hundred. That doesn't mean that the media disintegrates in that time--it's more an expectation of the fidelity of the data on the media. For videotape, a few lost bits of data aren't very significant because of the vast volume of information that is still good. The same few bad bits could make an executable file unable to successfully install a program or make a document unreadable. Paper is still the medium of choice for the Library of Congress because a lot of paper works go back thousands of years. No modern technology can match that proven history. Given a choice of magnetic or optical media for storing Poser files, I'll stick with CDRs.