I have heard that Gold media, CD’s and DVD’s, have been making a comeback. These are gold-layered discs, (important) not just gold-colored. They use a different technology in the production which gives them a much longer life-span, 100-300 years, instead of the usual 1-5.
The better known brands are Kodak and Mitsui. They’re $2-3 each, less if you buy in bulk. The DVD’s are about the same price as the CD’s so obviously a better bargain if you have DVD-capability.
Here are a few links. The prices are changing as I write. You might also find them in earthly stores if you’re not living in the backwoods like me.
Delkin 25PK DVD $58.35
Verbatim UltraLife Gold Archival Grade DVD-R 4.7GB 8X, 50 pack $78.90
Memorex 4.7 GB Pro Gold Archival DVD-R (5-Pack) $21.46
DataMediaStore Kodak Preservation Gold DVD-R 8X 25 Pack Spindle $53.75