Navigate to [https://nomad-lab.eu/prod/v1/staging/gui/about/information](https://nomad-lab.eu/prod/v1/oasis/gui/about/information)

Go to "publish" in the top left corner, and select "uploads" from the drop down menue

You will then see a list of your own uploads.

Identify the upload where you have the perovskite composition file, and click the arrow at the right of that line to reach the upload

Each upload could contain several files. Identify the one which you are interested in

You are then reaching a overview page where you can see the data for the composition file. Go to "file" in the horizontal top panel

Click the cloud icon to download the perovskite composition file as a JSON file

Download a JSON file with a perovksite composition from own upload