Unused File Group

Each database can have one or more File Groups, each with one or more files in them. Each database object (tables, indexes) is assigned to a file group. If a filegroup doesn't have any objects assigned to it, the files in that filegroup won't be used.

Suggested Action

šŸ’” Aireforge Advisor can automatically generate a script for this.

Remove the filegroup and any associated data files.

1. How to Drop Empty Filegroup Data Files

REMOVE FILE ExtraDataFile;  

2. How to Remove Unused Filegroup From the Database

ALTER DATABASE [WhippetWorks]  
REMOVE FILEGROUP ExtraFilegroup;  

Further Reading

Remove Defunct Filegroups (SQL Server) | Microsoft Docs

ALTER DATABASE (Transact-SQL) File and Filegroup Options | Microsoft Docs