Activating data at the Android level When the device is locked, encryption ensures that no one may access the data. Your data is decrypted when you unlock your encrypted device. In the event that your smartphone is stolen, encryption might provide additional security. It's a less time-consuming option to employing encrypted forms, which provide the majority of the benefits.
When collecting data, you should also make sure that device debugging (through adb) is turned off, as this can allow users to retrieve data from the device after it has been successfully started (when the sdcard encryption key is entered). i.e., if the debugging interface is active, someone might steal the device, connect it to a laptop, and extract data from it as long as it hasn't been turned off, as they don't need to open the device's lock screen.
Turn off cloud backups
Though backing up your data in the cloud is a good idea, law enforcement can demand that Google hand over your information. Turning off backup is the best approach to prevent your Android phone from transferring your personal info to its servers. The disadvantage is that if your phone is lost, you may lose your data. Always remember that you have the option of manually backing up your data to your personal computer.