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The Library of Congress has a great website on personal archiving of digital files
http://www.digitalpreservation.gov/personalarchiving/
There are great tips on preserving digital photos, audio, videos, email and websites.
Some of us have worried for years about preserving family photos and other family paper documents. And that is still a concern. But now it seems everything is digital. Our photos are on our computers, in our phones or on our cameras which can all be lost or damaged. Again, a scary thought for someone who has MANY albums of family photos but hasn't printed a photo in a decade.