The copy process is very slow with this function vb.net - vb.net

Question

I use this function for copying some files from the Source folder to the Destination folder, but the copying is needed more time than usual.
Sub SyncFiles(Lbl_Percentage As Label, Lbl_FileName As Label, PrgrsBar As ProgressBar)
Try
Dim Sql As String = "SELECT GroupID FROM Tbl_Current"
Dim GetGroupID = MsAcc_RetriveTemp(Sql, 0)
Dim Sql1 As String = "Select * FROM Tbl_SyncPath where ID=" & GetGroupID
Dim Src As String = MsAcc_RetriveTemp(Sql1, 1)
Dim Des As String = MsAcc_RetriveTemp(Sql1, 2)
If Not IO.Directory.Exists(Des) Then IO.Directory.CreateDirectory(Des)
Dim fls() As String = IO.Directory.GetFiles(Des)
PrgrsBar.Value = 0
PrgrsBar.Maximum = fls.Count
For Each fn As String In fls
Dim filename As String = IO.Path.GetFileName(fn)
My.Computer.FileSystem.CopyDirectory(Des, Src, True)
PrgrsBar.Value += 1 'add 1 to the ProgressBar`s value
Dim Percntge As Integer = (PrgrsBar.Value / fls.Count) * 100
Lbl_Percentage.Text = Percntge & " %"
Lbl_FileName.Text = "جاري تحديث ملف: " & filename
Application.DoEvents()
Lbl_FileName.Text = "اكتمل عملية التحديث."
Next
Catch ex As Exception
End Try
End Sub

Answer 1

You copy all the files in the folder for each files.
For Each fn As String In fls
Dim filename As String = IO.Path.GetFileName(fn)
My.Computer.FileSystem.CopyDirectory(Des, Src, True) ' <--- No file specified
PrgrsBar.Value += 1 'add 1 to the ProgressBar`s value
Dim Percntge As Integer = (PrgrsBar.Value / fls.Count) * 100
Lbl_Percentage.Text = Percntge & " %"
Lbl_FileName.Text = "جاري تحديث ملف: " & filename
Application.DoEvents()
Lbl_FileName.Text = "اكتمل عملية التحديث."
Next
Put this outside the loop
My.Computer.FileSystem.CopyDirectory(Des, Src, True)
For Each fn As String In fls
' ...
Next
Also, seems like des and src are mixed up.