Garageband additional software download status in Mac Where Can I see about the Garageband additional software download status, when it got opened for the first time? And how to stop it manually?

version detail:
mac os high sierra 10.13.4
garageband 10.3.0

update:
I was thinking, if there might be a window/option where we could see the status of download and can pause or stop in that window itself.
GarageBand app does the download (spinning up a com.apple.MAContentInstallation helper process), so to stop it - save your work in any open app documents and quit the app.

You should have been notified of this like so:



The downloads go to your user library, but before trying to clean that out - what happens if you reopen the app and watch the dialogs and/or see the options in the GarageBand menu Sound Library sub menu?