Ensure that your Teradata database is running and accessible. Confirm that you have the necessary credentials and permissions to create tables and insert data.

Use n8n to fetch and prepare the data you want to move to Teradata. This involves creating a workflow to collect data from your desired source (API, database, etc.) and transforming it if necessary into a suitable format such as JSON or CSV.

Add a node in your n8n workflow to export the prepared data as a CSV file. You can accomplish this by using the 'Write Binary File' node to save the data to a local directory on your server or a network-accessible location.

Log into your Teradata environment and use SQL to create a table that matches the schema of your n8n exported data. Ensure that data types and column names align with what you have in your CSV file.

```sql
CREATE TABLE YourTableName (
Column1 DataType,
Column2 DataType,
...
);
```

Use a secure method such as SCP (Secure Copy Protocol) or SFTP (Secure File Transfer Protocol) to transfer the CSV file from your n8n server to a location accessible by your Teradata database server.

Utilize Teradata's Bulk Loading utilities such as BTEQ or FastLoad to import the data from the CSV file into your Teradata table. Here's a basic example using BTEQ:

```bash
bteq << EOF
.LOGON your_teradata_server/username,password;
.IMPORT REPORT FILE = /path/to/your.csv;
.SET RECORDMODE OFF;
.REPEAT
USING (Column1 INTEGER, Column2 VARCHAR(100), ...)
INSERT INTO YourTableName VALUES (:Column1, :Column2, ...);
.LOGOFF;
EOF
```

After loading the data, run a few queries in Teradata to verify that the data has been transferred correctly. Check for discrepancies or errors. Once confirmed, clean up any temporary files and close connections to ensure there are no security vulnerabilities.

By following these steps, you can effectively move data from n8n to Teradata without relying on third-party connectors or integrations, thus maintaining control over the entire process.