If you’re worried about possible expansions of government surveillance and access to your information, or simply want to do some digital purging so you’re not saddled with old data, there are a bunch of concrete steps you can take to protect your digital privacy. Just as archeologists study carefully preserved tombs and ancient trash heaps to gain insight into historic communities, your long-forgotten digital footprint could be more revealing and sensitive than you realize. And while you can’t control everything—particularly information stolen in breaches or gathered by data brokers—you probably…