Excel Macro saving to a specific location help

Hi All,
Need some help on this one please.

Basically I have a macro that opens a file that is 2 business days prior, changes the date in the sheet to 1 previous business day, and then saves as the previous business day.

the issue is, it just saves the new file in the root. I need some help getting it to save in a specific location based on the month and day in the filename.

Example:
the file will be: "December 20 2013.xlsx"

I would like this to be saved under 2013\December\

Here is my code:

Option Explicit
Sub CopyWorkbook()

    ' modify path as required
    Const PathName As String = "Z:\Report"
    
    Dim SelFiles() As String
    Dim Fn As String                        ' File name
    Dim Sp() As String
   
    
    If GetSelectedFiles(PathName, SelFiles) Then
        Fn = NewFileName(SelFiles(0))
        If Len(Fn) Then
            Fn = WithSeparator(PathName) & Fn & ".xlsx"
            FileCopy SelFiles(0), Fn
            Workbooks.Open Fn
            With Workbooks.Open(Fn)
                Application.Calculation = xlCalculationAutomatic
                Sp = Split(.Name, ".")
                'add date
                .Sheets("Avg Daily Vol").Range("A5").Value = _
                        Left(.Name, Len(.Name) - (Len(Sp(UBound(Sp))) + 1))
                        
                'increment MTD, QTD, YTD
                .Sheets("Input").Range("B20").Value = _
                        .Sheets("Input").Range("B20").Value + 1
                        
                        .Sheets("Input").Range("B21").Value = _
                        .Sheets("Input").Range("B21").Value + 1
                        
                        .Sheets("Input").Range("B22").Value = _
                        .Sheets("Input").Range("B22").Value + 1
            End With
            'CloseThisWorkbook
        Else
            MsgBox "No valid file name was supplied.", _
                   vbCritical, "Can't rename"
        End If
    End If
End Sub

Private Function GetSelectedFiles(Pn As String, _
                                  SelFiles() As String) _
                                  As Boolean
    ' 0086 V 1.0
    
    Dim FoD As FileDialog                           ' File Open Dialog
    Dim SelItem As Variant                          ' Selected Item
    Dim i As Long                                   ' Index for SelFiles
    Dim DefaultDate As Date
    
    DefaultDate = Application.WorksheetFunction.WorkDay(Date, -2)
    Set FoD = Application.FileDialog(msoFileDialogFilePicker)
    With FoD
        .Title = "Choose the workbook to copy"
        .ButtonName = "Create Copy"
        .Filters.Clear
        .Filters.Add "Excel Files", "*.xls*", 1
        .InitialFileName = WithSeparator(Pn) & _
                           Format(DefaultDate, "MMMM d yyyy") _
                           & ".xlsx"
        .AllowMultiSelect = False
        If .Show Then
            For Each SelItem In .SelectedItems
               ReDim Preserve SelFiles(i)
               SelFiles(i) = SelItem
               i = i + 1
            Next SelItem
            GetSelectedFiles = True
        End If
    End With
    Set FoD = Nothing
End Function

Private Function NewFileName(Ffn As String) As String

    Dim Sp() As String
    Dim Fn As String                ' File name (old)
    Dim Fnn As String               ' File name New
    Dim Fd As Date                  ' File date
    
    Sp = Split(Ffn, "\")
    Fn = Split(Sp(UBound(Sp)), ".")(0)
    If IsDate(Fn) Then
        Fd = Application.WorksheetFunction.WorkDay(CDate(Fn), 1)
        Fnn = Format(Fd, "mmmm d yyyy")
        Fn = Fn
    End If
    NewFileName = InputBox("Copying the workbook" & vbCr & _
                           "of " & Fn & Format(CDate(Fn), "  (dddd)") & vbCr & _
                           "Please confirm or enter " & _
                           "the copy's file name." & vbCr & vbCr & _
                           IIf(IsDate(Fn), "(" & Format(Fd, "dddd") & _
                           ")", ""), "New file name", Fnn)
End Function

Private Function WithSeparator(ByVal PathName As String, _
                               Optional ByVal RemoveExisting As Boolean) _
                               As String
                       
    Do While Right(PathName, 1) = Application.PathSeparator
        PathName = Left(PathName, Len(PathName) - 1)
    Loop
    WithSeparator = PathName & IIf(RemoveExisting, "", _
                                   Application.PathSeparator)
End Function

'Sub CloseWorkbook()
'    SetAppScreen False
'    ThisWorkbook.Close SaveChanges:=xlDoNotSaveChanges
'End Sub

Thanks!