The data is in my laptop in a folder called fashion_mnist .
The contents of my clearml.conf are produced from the values passed to the helm chart as such

agentk8sglue:
  apiServerUrlReference:  "

"
  fileServerUrlReference: "

"
  webServerUrlReference:  "

"
  extraEnvs:
    - name: CLEARML_AGENT_UPDATE_VERSION
      value: "==1.9.2"
    - name: CLEARML_API_HOST
      value: "

"
    - name: CLEARML_FILES_HOST
      value: "

"
    - name: CLEARML_WEB_HOST
      value: "

"

The dataset was created like this

clearml-data create --project "Full Overview" --name "Fashion MNIST"
clearml-data add --files fashion_mnist
clearml-data close

I didn't set the output uri, I think that was created by the cli or something else.