Microsoft retires it's OneDrive music streaming in Groove Music app on March 31, 2019. Data stored in the Groove Music service will be deleted up to 30 days after that. Personal music files will continue to be available in OneDrive. Users can keep listening to their music using the OneDrive web player or by downloading the files and playing them in the Groove Music app. That has been announced on this FAQ page, where more details may be found.