Comment Re:stone tablets (Score 5, Informative) 251
... have always worked for me.
Here's an even better solution: Since this exact same question has been asked on Slashdot multiple times, and the topic has been beaten to death, just look in the archives and see what everyone recommended last time. Hint: The consensus recommendation was to pick at least two different media, and store them in a least two different geographical locations, then migrate to different media as technology improves.
The submitter is leaving out most important information: How much data? Storing terabytes is different than storing gigabytes (which will fit on a thumb drive). How long? The submitter says "backups" not "archives", which implies that long shelf life is not a priority, but many people use the terms interchangeably.