Every email you send, every selfie you take, every TikTok video you post adds to the amount of digital data in the world. And that pile of data is growing at an astonishing rate. According to recent estimates, by 2025, there will be in the neighborhood of 200 zettabytes of data zipping around in the world. To give you an idea of how much that is, one zettabyte contains a whopping 1,000,000,000,000,000,000,000 bytes, the basic unit in digital storage and processing. That’s a lot of information.