def read_telem_files() -> List[str]:
        telems = []
        try:
            file_paths = [
                path.join(TELEM_DIR_PATH, f)
                for f in listdir(TELEM_DIR_PATH)
                if path.isfile(path.join(TELEM_DIR_PATH, f))
            ]
        except FileNotFoundError:
            raise FileNotFoundError(
                "Telemetries to send not found. "
                "Refer to readme to figure out how to generate telemetries and where to put them."
            )
        for file_path in file_paths:
            with open(file_path, "r") as telem_file:
                telem_string = "".join(telem_file.readlines()).replace("\n", "")
                telems.append(telem_string)
        return telems