I don't have many and they're mostly A6 or B5 size, so they're lined up on part of one shelf on a bookcase! They don't have content I'd worry about my kid seeing, now or later. Some personal thoughts are in a notetaking app I've used for years, which I might delete before she gains access to my digital files. (I have casual access to one parent's passwords to serve as informal helpdesk, and power of attorney for the other, who lives in a long-term care facility; these are things I've had to ponder in detail for myself, not random concern.)