Code to show the manage external storage permissions settings (Android 11)

ShowManageExternalStorageSettings.pas

uses
  Androidapi.Helpers, Androidapi.JNI.Provider, Androidapi.JNI.GraphicsContentViewText;
  
procedure ShowManageExternalStorageSettings;
var
  LIntent: JIntent;
begin
  LIntent := TJIntent.Create;
  LIntent.setAction(StringToJString('android.settings.MANAGE_ALL_FILES_ACCESS_PERMISSION');
  LIntent.setData(TJnet_Uri.JavaClass.parse(StringToJString('package:' + JStringtoString(TAndroidHelper.Context.getPackageName()))));
  TAndroidHelper.Context.startActivity(LIntent);
end;