Physical outputs like photo albums and notebooks or documents. Then provide a digital copy as well, physically. Keep the formats as simple as possible, plain te

Physical outputs like photo albums and notebooks or documents. Then provide a digital copy as well, physically. Keep the formats as simple as possible, plain text, and video/photo formats that are universal, also document what the formats are for each category of content. I don't think there's any online digital method that can be guaranteed. Also, this may be hard to accept, unless you led an extraordinary life (I'm talking about your name being known by like 1000 actual humans for something specific, social media doesn't count), a generation or two later the media is most likely to be lost. Fires, storms, random thumb drives getting thrown out, etc. Think of how often you look back at content about your grandparents, for me its like once a year I'll look at the compiled genealogy a family member put together.