calpurtmun There is no option for storage scopes.
I believe storage scopes isn't needed as the app does not need access to files that it doesn't make and therefore doesn't request any file permissions. The GOS 'scopes' are ultimately just more finely controlled versions of existing Android permissions.
Also it would be good to use the more up-to-date fork for that app anyway (assuming you're still using the SMT version and ESPECIALLY if you're using the SMT app from Google Play which is owned by an ad company and is no longer open source).