Třeba takhle?

logovani.js
Kód:
var fso = WScript.CreateObject("Scripting.FileSystemObject");
var logfile="c:\\usb_log.txt";
var soubor = fso.OpenTextFile(logfile,8,true) ;
var cesta=fso.getAbsolutePathName(""); 
var datum= new Date();
soubor.WriteLine(datum.getDate()+"."+(datum.getMonth()+1)+". "+datum.getHours()+":"+datum.getMinutes()+" konstatntni text");
fso.CopyFile(logfile,cesta+"usb_log.txt");