For ebooks I created folders for main-categories and some sub-categories (inspired by Amazon.com or some other ebook shop structure). For photos folders per de

For ebooks I created folders for main-categories and some sub-categories (inspired by Amazon.com or some other ebook shop structure). For photos folders per device/year/month. For Office documents pre-pending date using the ISO date format (2017-06-21 or 170621) works great. (for sharing with others over various channels like mail/chat/fileserver/cloud/etc)