# Re-upload or append CSV

If you've collected additional data related to your previously uploaded CSV file or there have been changes to the existing data, you can use the re-upload option. This allows you to update or append new data to your existing dataset. Expanding your dataset with more records can benefit your machine learning model, but the impact depends on the quality and relevance of the new data. Learn more about the benefits of dataset expansion [here](/graphite-note-documentation/datasets/prepare-your-data/expanding-datasets.md).

#### How to Re-upload a CSV File:

1. **Go to the Datasets List**:
   * Navigate to the list of datasets.

<figure><img src="/files/eEBi1vKqjbz6bq0ZYoUS" alt=""><figcaption></figcaption></figure>

2. **Select the Dataset**:

* Choose the dataset you wish to re-upload.

<figure><img src="/files/3RcwdlDngX2SDVj7lsRd" alt=""><figcaption></figcaption></figure>

3. **Select Re-upload**:

* Click on the 'Re-upload' option.

<div align="left"><figure><img src="/files/wGBqwTIDFKJqeY1iheUM" alt="" width="563"><figcaption></figcaption></figure></div>

4. **Choose Options and upload**:

* **Decide on data append:**
  * Depending on your needs, you can choose 'Append data' to add new records to the existing dataset. If 'Append data' is turned off, the new dataset will overwrite the existing
* **Upload Your File**:
  * Select or drag and drop your CSV file. Ensure the file has the same column structure as the previously uploaded file.
* Click **Update** to complete the re-upload process.

<div align="left"><figure><img src="/files/QQQId9ATicLo3qwACSVN" alt="" width="563"><figcaption></figcaption></figure></div>


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