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@echo off
l1:
xcopy \\quelle (rechnername oder ip)\freigabeordner\*.* \\ziel (rechnername oder ip)\freigabeordner\ /Y /D /E
<sleep>
goto l1

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In Deine Batchdatei fügst Du an der Stelle wo die Pause kommen soll folgende Zeile ein:
cscript sleep.vbs 8

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Option Explicit

On Error Resume Next

Dim sSecs

If Not IsCscript() Then
  WScript.Echo "Please run this script using CSCRIPT."
  WScript.Quit(1)
End If

If ParseCmdLine(sSecs) Then
  WScript.Sleep CInt(sSecs)*1000
End If

WScript.Quit(0)


Private Function ParseCmdLine(sSecs)

  ParseCmdLine = False

  If WScript.Arguments.Count = 1 Then
    Select Case WScript.Arguments(0)
      Case "/?" : ShowUsage(True)
      Case "-?" : ShowUsage(True)
      Case "/h" : ShowUsage(True)
      Case "-h" : ShowUsage(True)
      Case "h"  : ShowUsage(True)
      Case Else : sSecs = WScript.Arguments(0)
                  ParseCmdLine = True
    End Select
  Else
    ShowUsage(True)
  End If

End Function


Private Function IsCscript()

  IsCscript = False

  If InStrRev(LCase(WScript.FullName), "cscript.exe", -1) Then
    IsCscript = True
  End If

End Function


Private Sub ShowUsage(bExit)

  WScript.Echo "Batch file wait."
  WScript.Echo ""
  WScript.Echo "Sleep causes the computer to wait for a specified amount of time. Sleep is"
  WScript.Echo "useful in batch files and may be more convenient to use than the AT command"
  WScript.Echo "(part of Windows NT 4+) in certain cases."
  WScript.Echo ""
  WScript.Echo "Sleep time"
  WScript.Echo ""
  WScript.Echo "  time     The number of seconds to pause."

  If bExit Then
    WScript.Quit(1)
  End If

End Sub

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ping -n 8 localhost > nul