Begin by logging into your Apple Search Ads account. Navigate to the reporting section and create a report that covers the data you wish to export. Apple Search Ads allows you to download reports in CSV format. Ensure the report includes all necessary data fields for your analysis. Once configured, export the report to your local machine.

On your local machine, ensure you have the necessary tools to interact with Snowflake. Install and configure a SQL client or use SnowSQL, Snowflake's command-line client, to interact with your Snowflake instance. Also, ensure that you have access to the directory where the CSV file is stored.

Log into your Snowflake account and create an internal or external stage to hold the data files. An internal stage is stored within Snowflake, while an external stage uses cloud storage like AWS S3. Use the following SQL command to create an internal stage:
```sql
CREATE STAGE my_apple_ads_stage;
```

Use the PUT command in SnowSQL or a similar SQL client to upload the CSV file from your local machine to the Snowflake stage you created. For example:
```shell
PUT file://path/to/your/apple_search_ads_report.csv @my_apple_ads_stage;
```

Determine the structure of the data from the CSV, and create a table in Snowflake that matches this structure. Use the CREATE TABLE statement to define the schema of your target table. For example:
```sql
CREATE TABLE apple_ads_data (
column1 STRING,
column2 STRING,
...
);
```

Use the COPY INTO command to load the data from the stage into your target table. This command will parse the CSV file and populate the table with its contents. For example:
```sql
COPY INTO apple_ads_data
FROM @my_apple_ads_stage/apple_search_ads_report.csv
FILE_FORMAT = (TYPE = 'CSV' FIELD_OPTIONALLY_ENCLOSED_BY = '"' SKIP_HEADER = 1);
```

After loading the data, run a few queries to verify that the data has been correctly imported into your Snowflake table. Check for any discrepancies or errors. Once verified, you can choose to remove the CSV file from the stage to clean up resources if no longer needed:
```sql
REMOVE @my_apple_ads_stage/apple_search_ads_report.csv;
```

By following these steps, you will successfully transfer data from Apple Search Ads to Snowflake without the use of third-party connectors or integrations.