Re: Permanent Storage
"Seems like the only way is to stay ahead and write everywhere on anything you can get your hands on - except stone, which can last thousands of years, but the playback is awful."
You obviously never saw "The Stone Tape" on the BBC.
Well, I never, here it is on youtubes:
Oooooh! It was a Xmas ghost story on Xmas day 1972.