SQL Server - Move MDF/LDF files to a designated path

Even though I'd prefer to Backup a database and then move , often a third party supplier
will need it as a MDF or LDF , which they then will have  a script to reattach .
The main steps are :

Detach DB
Move to designated path
ReAttach DB
2 input parameters: Name of DB on SAN, targeted path

The main issue to consider is permissions on network to actually transport the files .

The 'xp_cmdshell' is used (which I don't often recommend , but it does serve its purpose on this script

--------------------CODE START----------------------------------
     DECLARE  @DB_NAME NVARCHAR(128);
     DECLARE @FILE_PATH NVARCHAR(256);
     SET   @DB_NAME = 'MY_DB'
     SET   @FILE_PATH = 'MY_FILE_PATH'
     
      --variables
       DECLARE @SQL_A VARCHAR(300); 
       DECLARE @SQL_B VARCHAR(300); 
       DECLARE @SQL_C VARCHAR(300); 
       DECLARE @SQL_D VARCHAR(300); 
       DECLARE @SQL_E VARCHAR(2000); 
       DECLARE @DATA_FILE VARCHAR(600); 
       DECLARE @LOG_FILE VARCHAR(600); 
       DECLARE @MDF_FILE NVARCHAR(256);
       DECLARE @LDF_FILE NVARCHAR(256);
       DECLARE @FILENAME_TBL TABLE(fileType INT, FilePath NVARCHAR(256));
       --establish physical path and filename of MDF and LDF files
       SET @SQL_A = 'SELECT 1,filename from '+@DB_NAME+'.sys.sysfiles WHERE fileid = 1';
       SET @SQL_B = 'SELECT 2,filename from '+@DB_NAME+'.sys.sysfiles WHERE fileid = 2';
       
       INSERT INTO @FILENAME_TBL EXEC (@SQL_A);
    INSERT INTO @FILENAME_TBL EXEC (@SQL_B);
       SET @MDF_FILE = (SELECT FilePath FROM  @FILENAME_TBL WHERE fileType=1);
       SET @LDF_FILE = (SELECT FilePath FROM  @FILENAME_TBL WHERE fileType=2);
     
  
       ---- DETACH DB
       PRINT 'Detach DB : START';
        --set the DB to SINGLE USER
    SET @SQL_C = 'ALTER DATABASE ' + @DB_NAME + ' SET SINGLE_USER WITH ROLLBACK IMMEDIATE;';
    EXEC (@SQL_C);
      
       EXEC sp_detach_db @DB_NAME,'true'
       PRINT 'Detach DB : FINISH';
       

        --MOVE MDF file
        PRINT 'MOVE MDF & LDF : START';
        DECLARE @dataFile1Cmd VARCHAR(200),
     @dataFile2Cmd VARCHAR(200)
        
        SET  @dataFile1Cmd = 'copy "'+@MDF_FILE + '" "' +  @FILE_PATH + '"';
        
  SET  @dataFile2Cmd = 'copy "'+@LDF_FILE + '" "' +  @FILE_PATH + '"';
        EXEC master..xp_cmdshell @dataFile1Cmd
        EXEC master..xp_cmdshell @dataFile2Cmd
        PRINT 'MOVE MDF & LDF : FINISH';
     
      --REATTACH DB 
        PRINT 'Attach DB : START';
        SET @SQL_E = 'EXEC sp_attach_db @dbname = N'''+@DB_NAME +''',@filename1 = N'''+@MDF_FILE+''',@filename2 = N'''+@LDF_FILE+'''';
        PRINT @SQL_E;
        EXEC (@SQL_E);
        SET @SQL_D = 'ALTER DATABASE ['+@DB_NAME+'] SET MULTI_USER WITH ROLLBACK IMMEDIATE';
        EXEC (@SQL_D);
        PRINT 'Attach DB : FINISH';
--------------------CODE END----------------------------------