How many terabytes is the internet?

internet isn't any specifiq space. Its a system that connects computers to computers. Each website is a computer(in a very basic way, usually its server). So what you are doing is accessing someones computer when you are visiting a website. Its increasing everyday. If i were to estimate a size of total connected computers size, it would be in terabytes. It would be more than 1 billoion terabytes, 1 Zettabyte and growing. My computer itself has 3 terabyte harddisk space intotal.