How to delete data permanently in Android mobile phone by using Secure Delete apps

1. see the guides in

https://android.gadgethacks.com/how-to/delete-files-android-so-they-cant-ever-be-recovered-0169550/


2. Just delete with any files explorer in yr phone. I prefer to use CX Explorer , just click the analyse button, and you will be guided to complete the task of deleting, but not permanently deleted.

3. check the contents or analysis of yr phone by using diskinfo. remember to refresh it from time to time.

4. Activate Secure Eraser, just click start button. Make sure you change the working platform to EXTERNAL to allow the apps to complete the task in your SD external storage. If you have SD storage. If nil, leave it to INTERNAL, but it might take longer time to complete the task of permanently delete the data.