Android gives you the encryption tools you need to secure your device right out of the box. Google required manufacturers to enable full-disk encryption starting with Android 6.0 Marshmallow in 2015. With the release of Android 10 in 2019, that requirement was revised to the newer file-based encryption instead. The encryption key lives on the Android device, making it impossible to read the microSD cards data anywhere else or even after a factory reset. Alternatives: Encrypt files with an Android app or use a third-party app.”]
Source: https://www.androidauthority.com/how-to-encrypt-android-device-326700/