循环遍历 excel 文件中的工作表并另存为 csv 文件的问题

我正在编写一个遍历文件夹中文件的函数。在每个文件中，遍历工作表并将它们保存为 CSV 文件。我在没有翻阅床单的情况下对它们进行了测试，效果很好。但是，当我循环浏览工作表时，它会不断循环浏览文件。我跑了调试，发现到了最后一个文件的末尾时，又回到了第一个文件。我找不到哪里出了问题。这是我的代码：

Sub morningstar_VBA()
'PURPOSE: To loop through all Excel files in a user specified folder and perform a set task on them
'SOURCE: www.TheSpreadsheetGuru.com

Dim wb As Workbook
Dim myPath As String
Dim myFile As String
Dim myExtension As String
Dim filename As String
Dim path_to_save As String
Dim FldrPicker As FileDialog
Dim w As Long

'Retrieve Target Folder Path From User
  Set FldrPicker = Application.FileDialog(msoFileDialogFolderPicker)

    With FldrPicker
      .Title = "Select A Target Folder"
      .AllowMultiSelect = False
        If .Show <> -1 Then GoTo NextCode
        myPath = .SelectedItems(1) & "\"
    End With

'In Case of Cancel
NextCode:
  myPath = myPath
  If myPath = "" Then GoTo ResetSettings

'Target File Extension (must include wildcard "*")
  myExtension = "*.xlsx*"

'Target Path with Ending Extention
  myFile = Dir(myPath & myExtension)

'Loop through each Excel file in folder
  Do While myFile <> ""
    'Set variable equal to opened workbook
    Set wb = Workbooks.Open(filename:=myPath & myFile)

    'Ensure Workbook has opened before moving on to next line of code
    For w = 1 To Worksheets.Count
        With Worksheets(w).Copy
            'the ActiveWorkbook is now the new workbook populated with a copy of the current worksheet
            With ActiveWorkbook
                filename = .Worksheets(1).Name
                path_to_save = "E:\Morningstar_download\test\" & filename
                .SaveAs filename:=path_to_save, FileFormat:=xlCSV
                DoEvents
                .Close savechanges:=False
            End With
        End With
    Next w

    wb.Close savechanges:=True

    'Ensure Workbook has closed before moving on to next line of code
    DoEvents

    'Get next file name
    myFile = Dir
  Loop

'Message Box when tasks are completed
  MsgBox "Task Complete!"

ResetSettings:
  'Reset Macro Optimization Settings
    Application.EnableEvents = True
    Application.Calculation = xlCalculationAutomatic
    Application.ScreenUpdating = True

End Sub