When every application is created, each application has an ASD, or application specific directory. This ASD is a folder/directory for your app to store data, and only your app can access it. For devices with Android 10 or above, this ASD is automatically created, but with phones before that, you have to create an ASD.
This is an extension to do that.
My previous post creates a folder in the ASD. I don't know what do you mean by