About filegroups in SQL Server

You can optionally create one or more filegroups to support the PolicyCenter logical tablespaces. If you choose to use filegroups, create a separate filegroup for each logical tablespace. As you configure the PolicyCenter database connection, you can map the filegroups you create to the PolicyCenter internal logical tablespaces.

For the filegroups, it is possible to use either the same names as the logical tablespace names (with one exception) or to use entirely different names. However, do not use INDEX as a filegroup name. INDEX is a reserved name on SQL Server, so it is not possible to map the logical tablespace INDEX to a physical filegroup of the same name.