Cloud storage would work best, stored at multiple data-centers for extra redundancy, stored with multiple cloud services to be extra cautious. Gold CDs claim t

Cloud storage would work best, stored at multiple data-centers for extra redundancy, stored with multiple cloud services to be extra cautious. Gold CDs claim to last 300 years and are not too expensive: http://www.amazon.com/Kodak-Gold-Preservation-Write-Once-CD-R/dp/B001DC9UFU/ http://www.amazon.com/Kodak-Gold-Preservation-Write-Once-CD-... Here are 50 DVDs for $14 that are suppose to last 50-100 years: http://www.amazon.com/Verbatim-DataLifePlus-Printable-Recordable-95078/dp/B0007M0VXW/ http://www.amazon.com/Verbatim-DataLifePlus-Printable-Record... The 200,000 CDs at the Library of Congress could be backed up on a RAID-1 NAS, but partnering with a cloud storage service might still be a better idea, plus it would allow people to download some of the data if the author allows it.