Sure, whilst you're alive, your data is being preserved and transported to new ways to store it. But what about when it's your children and grandchildren? My f

Sure, whilst you're alive, your data is being preserved and transported to new ways to store it. But what about when it's your children and grandchildren? My father has most of my grandmother's personal effects and pictures. Can you bet that your grandchildren will be able to access and recognize your data, pictures and music. As an example, we've already seen one DRM protected storage system fail in the market, the ironically named 'PlayForSure', any guarantee that others will survive? What about archaic image formats? What about 40 years from now?