Before uninstalling the Filestream provider, make sure that you have content migrated back in the content database. To ensure this, just open “AllDocStreams” in the SharePoint Content database and look at the “Content” and “Rbsid” columns. the “Rbsid” columns should be NULL and “Content” column should be filled with data.
If you uninstall the RBS provider before migrating the data back in the content database, all the data will become unavailable/ inaccessible.
Use following command to Migrate content back and forth from and to DB to Blob Store: