Hello, I am new here. I need help with something very basic but can't seem to find anyone that knows how to do it. I am a school secretary wanting to send out a mass notification or message to a certain group of parents. I know how to create a group by choosing the students/parents individually but how do I create a new private group by using a file I upload. I don't want to individually choose 450+ names. That would take me forever. I've tried to upload a .csv file and a .text file and both will not upload or Bb will not recognize the file.