Can you prove your were born? Or married? Lots of people can't - because they have mislaid their family records. You might be surprised by some of Marcena VerPloeg's recommendations for a 4-part record-filling system that combines maximum security with easy access.
"Especially for Homemakers,"
Iowa Farm Science: Vol. 19
, Article 4.
Available at: https://lib.dr.iastate.edu/farmscience/vol19/iss3/4