Excel VBA to save consolidate multiple workbooks into a specific folder

Experts,
Please, I'll like to save this working solution for consolidating multiple excel workbooks into a specific folder. I've added this to my module but it won't work. Please, can I get a standard way for me to choose the folder I want to save the consolidated file into. Thank you

Original code  writer: @ProfessorJimJam

 ' Save the consolidated workbook
    ActiveWorkbook.SaveAs FileName:="C:\Users\shallysteazy\Documents\ConsolidatedWorkbook.xlsx"

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Sub MergeTest()

    Dim SummarySheet As Worksheet
    Dim FolderPath As String
    Dim SelectedFiles() As Variant
    Dim NRow As Long
    Dim FileName As String
    Dim NFile As Long
    Dim WorkBk As Workbook
    Dim SourceRange As Range
    Dim DestRange As Range
    Dim LastRow As Long

    ' Create a new workbook and set a variable to the first sheet.
    Set SummarySheet = Workbooks.Add(xlWBATWorksheet).Worksheets(1)

    ' Open the file dialog box and filter on Excel files, allowing multiple files
    ' to be selected.
    SelectedFiles = Application.GetOpenFilename(filefilter:="Excel Files (*.xl*), *.xl*", MultiSelect:=True)

    ' NRow keeps track of where to insert new rows in the destination workbook.
    NRow = 1

    ' Loop through the list of returned file names
    For NFile = LBound(SelectedFiles) To UBound(SelectedFiles)
        ' Set FileName to be the current workbook file name to open.
        FileName = SelectedFiles(NFile)

        ' Open the current workbook.
        Set WorkBk = Workbooks.Open(FileName)

        ' Get row number of last used row
        LastRow = WorkBk.Worksheets(1).Cells.Find(What:="*", _
                                                  After:=WorkBk.Worksheets(1).Cells.Range("A1"), _
                                                  SearchDirection:=xlPrevious, _
                                                  LookIn:=xlFormulas, _
                                                  SearchOrder:=xlByRows).Row

        ' Set the cell in column N to be the file name.
        SummarySheet.Range("N" & NRow).Value = FileName
        
        ' Create header row
        Set SourceRange = WorkBk.Worksheets(1).Range("A1:O1")
        Set DestRange = SummarySheet.Range("A1:O1")
        DestRange.Value = SourceRange.Value

        ' Set the source range to be B1 through O?.
        ' Modify this range for your workbooks. It can span multiple rows.
        Set SourceRange = WorkBk.Worksheets(1).Range("A2:O" & LastRow)

        ' Set the destination range to start at column A and be the same size as the source range.
        Set DestRange = SummarySheet.Range("A" & NRow)
        Set DestRange = DestRange.Resize(SourceRange.Rows.Count, SourceRange.Columns.Count)

        ' Copy over the values from the source to the destination.
        DestRange.Value = SourceRange.Value

        ' Increase NRow so that we know where to copy data next.
        NRow = NRow + DestRange.Rows.Count

        ' Close the source workbook without saving changes.
        WorkBk.Close savechanges:=False
    Next NFile

    ' Call AutoFit on the destination sheet so that all data is readable.
    SummarySheet.Columns.AutoFit
    
    ' Save the consolidated workbook
    ActiveWorkbook.SaveAs FileName:="C:\Users\shallysteazy\Documents\ConsolidatedWorkbook.xlsx"
End Sub

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