We have everything on two identical thumb drives with paper notes around to locate the drives. All documents prepared by lawyer, multi page list of passwords on spreadsheet, list of assets including where they are held and approx how much $ in each on spreadsheet, two separate word documents with other things someone should know, such as suggestions, details about possessions, details about where original legal documents are held. Our kids know some of the basics. These documents are evolving and we plan to update them every year or two (besides the lawyer prepared ones)