I have done some tests on Android 7:
Test 1) Uploaded the files to assets, compiled and installed the app: Using the Total Commander I can not get access to the assets. Good, but it has some disadvantages.
Test 2) Defined a web component to download the files, compiled and installed the app: Using the Total Commander I can get access to the files under /storage/emulated/0/Android/data/appinventor.ai_myusername.AppName/files
Test 3) Defined a web component to download a ZIP file which will be unzipped using Taifun's ZIP extension and then delete the ZIP file, so I compiled and installed the app: Using Total Commander I can get access to the files under /storage/emulated/0/Android/data/appinventor.ai_myusername.AppName/filesFTP
Since I have almost 100 files which occupies more than 200MB in total I understand that uploading these to the assets is not an option.
I can not test this with Android 10 since Total Commander is allowing me to access to just to storage/emulated/0/Android/data/
Am I missing something?, I just want to have my files available for my App and not avaible for any other 3rd party app nor the user via USB connection.
Thanks for any hint,