Go to your App Tray and open the Settings app. Insert a SD card into your phone and move the data you want to encrypt on it. We use a Samsung Galaxy S7 as the example. And you can follow the steps below to encrypt your SD card and protect your data. In another word, people without your permission cannot access your files on the encrypted SD card. Once encrypt SD card, everyone want to access your data has to enter the secret key or password to decrypt it.
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