Removing ndf files

Hi All,

I have partitioned a table with 5 different NDF files.

Now, I need to repartition with a different column. How will I bring back all the ndf data to the PRIMARY filegroup?

DBCC SHRINKFILE ('ndf_file_name', EMPTYFILE) --> will this move to the primary file group or to any other filegroup?

Kindly guide.

Thanks

Pad