Populate spreadsheet with Google Doc file names and size R02

function calculate() {
  //R01 can be found in http://pastebin.com/2uRe6GR0
  //R02=>
  //var fileList = DocsList.getFiles();
  //var count = fileList.length;
  var files = DriveApp.getFiles();
  //R02<=
  var file;
  var i;
  var theSheet = SpreadsheetApp.getActiveSheet();


  theSheet.clear();
  theSheet.getRange(1, 1).setValue("File Name");
  theSheet.getRange(1, 2).setValue("File Location(s)");
  theSheet.getRange(1, 3).setValue("File Size");
  //R02=>
  //for (i=0; i<count; i++)
  i = 0;
  while (files.hasNext())
  //R02<=
  {
    //R02=>
    //file = fileList[i];
    file = files.next();
    i++;
    //R02<=
    theSheet.getRange(i+2, 1).setValue(file.getName());
    theSheet.getRange(i+2, 3).setValue(file.getSize());

    var folders = file.getParents();
    var folderNames = "";
    //R02=>
    //var fIdx;
    //for (fIdx in folders)
    //{
    //  folderNames = folders[fIdx].getName() + "; " + folderNames;
    //}
    while (folders.hasNext())
    {
      var folder = folders.next();
      folderNames = folder.getName() + "\\" + folderNames;
      if(!folders.hasNext())
      {
        folders = folder.getParents();
      }
    }
    //R02<=
    theSheet.getRange(i+2, 2).setValue(folderNames);
  }

  theSheet.sort(3, false);
  //R02=>
  //theSheet.getRange(2, 3, count, 1).setNumberFormat("#,##0")
  theSheet.getRange(2, 3, i+2, 1).setNumberFormat("#,##0")
  //R02=>
}