My app only downloads some files when it is started the first time (to make a smaller aab bundle) and store them in the app’s own directory and this is done with the WRITE READ PERMISSION only.
to store something in the ASD you do not need any permissions
which extensions are you using?
Edit: I’m not aware, that any component or extension uses the MANAGE_EXTERNAL_STORAGE permission…
to find out how your manifest looks like, see this thread