var arrA3 =[1, 4, 3, 2,8,9,10,4,8,2]
let uniq=[...new Set(arrA3)]
console.log(uniq)

//Мой код выглядит примерно так:
function copyFileToSharedDrive(){

var sharedDriveId = "sharedriveidcomeshere";
var sharedDrive = DriveApp.getFolderById(sharedDriveId);
var appsScriptFileId = "appsscriptfileidcomeshere";
DriveApp.getFileById(appsScriptFileId).makeCopy(sharedDrive).setName("This is a copy of the original apps script file");
}

function copyFileToSharedDrive(){
  var destinationFolderId = "###";  // Please set the destination folder ID of shared Drive.
  var appsScriptFileId = "###";  // Please set the GAS script ID.

  var file = DriveApp.getFileById(appsScriptFileId)
  var copiedFile = file.makeCopy().setName(file.getName()).getId();
  Drive.Files.patch(
    {title: "This is a copy of the original apps script file"},
    copiedFile,
    {removeParents: "root", addParents: destinationFolderId, supportsAllDrives: true}
  );
}