First, ensure you have access to Freshdesk's API. You'll need an API key, which can be found in your Freshdesk account under Profile Settings. The API key is essential for authenticating requests.

Determine which data you need to export, such as tickets, contacts, or companies. Freshdesk's API documentation provides endpoints for various data types, so familiarize yourself with the available options.

Write a script to make API requests to Freshdesk. You can use a programming language like Python to send HTTP GET requests to the relevant Freshdesk API endpoint. Include your API key in the request headers for authentication.

Example using Python:
```python
import requests
import json

api_key = 'your_api_key'
domain = 'your_domain'
endpoint = f'https://{domain}.freshdesk.com/api/v2/tickets'

headers = {
'Content-Type': 'application/json',
}

response = requests.get(endpoint, headers=headers, auth=(api_key, 'X'))
data = response.json()
```

Freshdesk API responses may be paginated. Check the API documentation for pagination details and modify your script to loop through pages if necessary. Typically, you will need to use query parameters like 'page' and 'per_page' to navigate through pages.

Extract the fields you need from the API response. The data returned will likely be in JSON format. Parse this JSON to access specific fields you want to include in your CSV file.

Example of extracting data:
```python
tickets = []
for ticket in data:
tickets.append({
'id': ticket['id'],
'subject': ticket['subject'],
'status': ticket['status']
# Add other fields as needed
})
```

Convert the extracted data into CSV format. You can use Python's `csv` module to write the data to a CSV file. Define the columns based on the fields you extracted.

Example of converting to CSV:
```python
import csv

with open('freshdesk_data.csv', mode='w', newline='') as file:
writer = csv.DictWriter(file, fieldnames=['id', 'subject', 'status'])
writer.writeheader()
for ticket in tickets:
writer.writerow(ticket)
```

Execute your script to ensure it runs correctly and outputs the data to a CSV file as expected. Verify the CSV file by opening it in a spreadsheet application to check that the data is accurate and complete. Adjust the script as necessary to handle any issues or errors.

By following these steps, you can successfully move data from Freshdesk to a local CSV file without using third-party connectors or integrations.