Cross devices cross os cloud for pdf files
Similar to iCloud, a unique Adobe I’d given to a person when the first use software to view pdf files. Free to view cloud across all devices, all operating systems but paid to download or change them. I deleted yahoo mail but I had viewed them on old devices. Yahoo deleted them after 7 days, gone. But pdf attachment is Adobe and is your property, users free or paid can pay for using software to save or change or to access cloud to view and if they want to save and download then they upgrade. Benefits users and increases Adobe revenue. Library of pdf that never gets deleted. 1000 years from now old files will tell our history. Service to human kind. Noble prize idea
Rod Moses commented
Did not check for grammar I’d should be * ID as in a user name email or some identifier built or encrypted into the file that traces who it’s sent to and can be traced.