Seagate has demonstrated hard drive technology that squeezes a trillion bits into a single square inch, claiming it’s the first hard drive manufacturer to do so.
During the next 10 years, the company says, this will lead to standard 3.5-inch drives that can store 60 terabytes of information. Today’s 3.5-inch drives (like the one in your current PC) give you three terabytes of storage, stuffing about 620 billion bits into each square inch.
To give you an idea of how much that is, the hard disk contains more bits in a single square inch than the Milky Way has stars.