Hi @hugh , welcome to the forum!

For large files, larger than 50 MB, the recommendation is to use the chunked uploads.

I’ve also wrote an article detailing all the upload options for Box.

Not sure if you are using the REST API directly or one of the SDKs, the above examples are in Python.

Let us know if this helps.

@rbarbosa Thank you very much, the information you provided has been of great help to me. I read through the box-python-sdkand found that when using chunked upload, I can choose to upload in the form of a file stream. Does this increase my upload speed? I need to upload a game package, specifically a 16GB zip file.

test_file_path = '/path/to/large_file.mp4'


with open(test_file_path, 'rb') as content_stream:


  total_size = os.stat(test_file_path).st_size


  upload_session = client.folder('0').create_upload_session(file_size=total_size, 


  file_name='large_file.mp4')


  chunked_uploader = 


  upload_session.get_chunked_uploader_for_stream(content_stream=content_stream, file_size=total_size)


  uploaded_file = chunked_uploader.start()


  print(f'File "{uploaded_file.name}" uploaded to Box with file ID {uploaded_file.id}')

Hi @hugh

Probably not, if I remember correctly the SDK always uses a stream upload in the end.

You can try to take advantage of multi threading, although Python is not ideal because of the Global Interpreter Lock. By default the chunked uploader uses 5 threads, but you can adjust to your situation.

Let us know if this helps