Artifacts

You have a workflow that uploads a text file named my-artifact.txt:

steps:
  - name: Upload artifacts
    uses: actions/upload-artifact@v3
    with:
      name: my-artifact
      path: my-artifact.txt

After the workflow run is complete, you're able to view it on the Summary tab of the GitHub actions UI:

When you click the name of the artifact, a file is downloaded to your local storage. Write the file name along with its extension.