CopyFileById.gs

/**
 * Copies the given file the given number of times.
 * @param {String} sourceFileId Source file ID (can be taken from source file URL), mandatory
 * @param {int} copyCount Number of copies to make; mandatory
 * @param {String} targetFolderId ID of the target folder; optional (My Drive root folder by default)
 * @param {String} targetNameStart Copy names prefix (will be followed by numbers); optional (source file name by default)
 * @param {Boolean} share whether to enable edit access for everyone with the link; optional (true by default)
 * @return {Object} Execution outcome (ok, error or partial) with details
 */
function CopyFileById(sourceFileId, copyCount, targetFolderId, targetNameStart, share) {
  if (!copyCount || copyCount <= 0) {
    return { outcome: "error", errorMessage: "Copy count is not valid" };
  }

  var sFile = DriveApp.getFileById(sourceFileId);
  var tfl = targetFolderId ? DriveApp.getFolderById(targetFolderId) : DriveApp.getRootFolder();
  targetNameStart = targetNameStart || sFile.getName();

  if (sFile) {
    if (tfl) {
      var copiesMade = 0;
      var copies = [];
      var errors = [];
      for (var i = 1; copiesMade < copyCount; i++) {
        var fileName = targetNameStart + i;

        var foundFile = tfl.getFilesByName(fileName);
        if (!foundFile.hasNext()) {
          var name = targetNameStart + i;
          try {
            copies.push(name)
            var copy = sFile.makeCopy(name, tfl);
            if (typeof share === 'undefined' || share) {
              copy.setSharing(DriveApp.Access.ANYONE_WITH_LINK, DriveApp.Permission.EDIT);
            }
          } catch (error) {
            errors.push({ error, name });
          }
          copiesMade++;
        }
      }
      if (errors.length) {
        return { outcome: "partial", message: "Some errors during file copy", copies, errors, share: Boolean(share) };
      } else {
        return { outcome: "ok", message: "Files copied successfully", copies, share: Boolean(share) };
      }

    } else {
      return { outcome: "error", errorMessage: "Target folder not found" };
    }
  } else {
    return { outcome: "error", errorMessage: "Source file not found" };
  }
}