With this macro, I can list files in a selected directory.
In the spreadsheet, there already exists a list created previously.
Currently, the macro asks which rows to delete before it re-writes the total list of files (this is done because the list changes frequently).
What I want to do instead, is select a range and then apply an update (add if new, nothing if it exists, delete if not there anymore).
There will be data above and below, so additions/subtractions need add/delete row.
Will this be possible?

Dim Row As Long

Sub File_list()
    Dim rRange As Range
    Dim sFolder As FileDialog
    On Error Resume Next
    Set rRange = Application.InputBox(Prompt:="Select rows to delete", Title:="Replacing?", Type:=8)
    With rRange
        .Offset(0, 0).SpecialCells(xlCellTypeVisible).EntireRow.Delete
    End With
    Set sFolder = Application.FileDialog(msoFileDialogFolderPicker)
    If sFolder.Show = -1 Then
        Row = 0
        File_Details_List_Files sFolder.SelectedItems(1), True
    End If
End Sub

Private Sub File_Details_List_Files(ByVal SourceFolderName As String, ByVal IncludeSubfolders As Boolean)
    Dim FSO As Object
    Dim SourceFolder As Object
    Dim FileItem As Object
    Dim strFile As String
    Dim FileName As Variant
    Set FSO = CreateObject("Scripting.FileSystemObject")
    Set SourceFolder = FSO.GetFolder(SourceFolderName)
    If Row = 0 Then Row = ActiveCell.Row
    With CreateObject("Scripting.Dictionary")
        For Each FileItem In SourceFolder.Files
            strFile = FileItem.Name
            .Item(strFile) = Array(FileItem.Name)
        Next FileItem
        If .Count > 0 Then
            For Each FileName In .Items
                Rows(Row).Insert
                Cells(Row, 1).Formula = FileName
                Row = Row + 1
            Next FileName
        End If
    End With
    Set FileItem = Nothing
    Set SourceFolder = Nothing
    Set FSO = Nothing
End Sub