Navigate to <https://nomad-lab.eu/prod/v1/staging/gui/about/information>

Give the upload a sensible name and press save

Click "Drop files here or click to open dialog"

For this to work there are two things to concider

1. The file ending must be .archive.json
2. In the data section in the file, add the following key value pair

   "m_def":"perovskite_solar_cell_database.composition.PerovskiteComposition",

Check if the process status becomes "success". To inspect the data, press the arrow to the right of the new entry

Create a perovskite composition from file