Action not allowed: downloading files for the specified purpose is restricted.

To resolve the "Not allowed to download files of purpose: assistants" error with a 400 status code in the OpenAI API, you need to adhere to the restrictions set by OpenAI. Here are some concise steps to address this issue:

• Check the file purpose: Ensure the files you are trying to download are not associated with the 'assistants' purpose.

• Use allowed file types: Only attempt to download files that are permitted by OpenAI's policies, such as results from fine-tuning runs.

• Review OpenAI documentation: Refer to OpenAI's documentation to understand the specific limitations and allowed file types for downloads.

• Alternative storage: Consider storing files in an alternative location if they cannot be downloaded through the OpenAI API.

By following these guidelines, you can avoid the 400 error related to file download restrictions.