People used to keep diaries of their lives, and to some extent this has been replaced by social media. We are probably more prolific nowadays than we would have been in the past. Though I wonder who the Ben-Gurions and Arthur Leeches of the world are today.
Like the inexpensive paper volumes of the past, digital storage is now dirt cheap. NAS devices and external USB drives have dropped in price to the point where we can treat them like yearly volumes.
So get a 2TB NAS, and fill it with your movies, pictures, audio, books, papers, etc. When you've filled it, just get another one and put it on your home network.
You'll never have to delete or make space for something again, and you'll gain a collection that reflects your life.