Here is an extension to get the ASD (path of app specific directory) which is becoming more and more important on Android 10 and above.
de.bodymindpower.GetASD.aix (5.9 KB)
You can also get this with the TaifunFile extension from @Taifun or the FileTools extension from @vknow360.
But if you only need the path of the ASD:
/storage/emulated/0/Android/data/<packageName>/files
you can also take this small extension (5.9 instead of > 32 KB).