> For the complete documentation index, see [llms.txt](https://docs.portexai.com/portex-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.portexai.com/portex-docs/data-marketplace/upload-a-dataset.md).
# Upload a Dataset
The first step to listing a data product on the Datalab is uploading a dataset. From the Data Studio, go to Datasets and click "Add new item."
## Upload Options
### Upload a File
Upload a dataset directly to the Datalab. Accepted formats:
* `.parquet` for tabular data
* `.tar.gz` or `.gz` for multi-modal bundles
Maximum size: 20 GB. Enter a dataset name and an init commit message (max 300 characters), then drag and drop your file or click "Choose file."
### External Dataset
If your data is hosted externally (e.g., an S3 bucket), select "External Dataset" and provide the connection type and estimated size. External datasets are verified at the time of purchase.
### Eval Dataset
To upload an eval dataset bundle (tasks.json, answers.json, reference files), see [Importing an Eval](/portex-docs/for-experts/importing-an-eval.md).
## After Upload
Your dataset appears in the Data Studio under the Datasets tab. From here, you can edit the dataset name, upload a new version, or delete it.
To make the dataset available for purchase, proceed to [Create a Listing](/portex-docs/data-marketplace/create-a-listing.md).
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