Step 1:Create file in d: drive with name "test.txt"
Step 2:Create VB Script file and put below code in it
'---Code start Here---
Set data="test1"
Set oFSO =CreateObject("Scripting.FileSystemObject")
Set objFileToWrite = oFSO.OpenTextFile("d:\test.txt",8,true) '8 for Append
objFileToWrite.WriteLine(data)
objFileToWrite.Close
Set objFileToWrite = Nothing
'--End Here--