Option Explicit
Sub test()
Dim Wks As Worksheet
Dim MonChemin As String, MonFichier As String
MonChemin = ThisWorkbook.Path & "\"
With Application
.ScreenUpdating = False
.DisplayAlerts = False
End With
For Each Wks In ThisWorkbook.Sheets
MonFichier = Wks.Name & ".xlsx"
Wks.Copy
Application.ActiveWorkbook.SaveAs MonChemin & MonFichier
Application.ActiveWorkbook.Close False
Next Wks
With Application
.ScreenUpdating = True
.DisplayAlerts = True
End With
End Sub