import os

def create_target_data_file():
    """
    Creates target data file if it does not exist.

    Checks for the existence of '/Eden_OLD_2TB/target_data.txt' and creates it if it doesn't exist.
    """
    target_data_path = '/Eden_OLD_2TB/target_data.txt'
    
    # Check if directory exists, create it if not
    dir_path = os.path.dirname(target_data_path)
    if not os.path.exists(dir_path):
        os.makedirs(dir_path)
        
    # Create file if it doesn't exist
    if not os.path.exists(target_data_path):
        open(target_data_path, 'w').close()