Restore / Create a database with a data file (MDF) from backup the same but with two data files (MDF and NDF)
You need to include the .NDF file in your restore script.


 RESTORE DATABASE mydb
    FROM  DISK='\\150.10.10.12\backup\mydb.bak' 
    WITH  
        REPLACE
      , RECOVERY
      , MOVE 'IMAGENES_Data' TO 'F:\MSSQL\Data\Mydb.mdf'
      , MOVE 'IMAGENES'      TO 'F:\MSSQL\Data\Mydb.ndf' 
      , MOVE 'IMAGENES_Log'  TO 'G:\MSSQL\LOG\Mydb_LOG.ldf';