Credits Management for Dust: Documentation & File Size Limits

Hi everyone, I would like to know more about credits management for Dust using Zapier / Make / n8n. Is there any documentation regarding this topic ? How could I know the volume I used ? Another question : there is a file size limit of 2MB for Pro Plan and 10 MB for Entreprise Plan. I would like to know more about the context : Is it about uploading a file in a conversation ? or for the maximum size for a file in a datasource ? Is there any workaround like cutting files in multiples smaller files ? Thank you