2👍
I’ve found this issue: https://github.com/jschneier/django-storages/issues/30
It seems the support for multipart-upload was added not long after that. Since then the code has changed a bit, but here you can find the most recent code: https://github.com/jschneier/django-storages/blob/master/storages/backends/s3boto3.py
See the __init-method of the S3Boto3StorageFile class: you can specify a buffer_size as parameter (min is 5MB – requirement of AWS), or you specify this via setting AWS_S3_FILE_BUFFER_SIZE .
I see that this is not in the documentation, but the code suggests that it should work. Hope this helps (haven’t tried it myself yet).
Edit: found this overview of available settings:
https://gist.github.com/datagrok/2414f981380c751538751e7b3ab8e3e8