"upload -> store -> share." Upload where and for how long? What happens to the files over time? What about huge files and ability to pause/resume upload? What

"upload -> store -> share." Upload where and for how long? What happens to the files over time? What about huge files and ability to pause/resume upload? What about encryption? What about sharing with more that one person at the time? Will it allow me to preview a file before I download it? Saying " upload -> store -> share." is oversimplifying as " upload -> store -> share" does not work for anyone who is using file sharing to conduct professional services (think of a law firm with bounced emails because the 5Mb attachment was too big, or a law firm that needs to receive email notification on file delivery etc.)