The maximum file size, regardless of file type, is ~1000MB (1GB) per file. This applies to all areas where files can be uploaded in Bonfire - Internal files, Public files/Supporting documentation, Public Notices/Q&A messages files, and submission files. 

For example, if your submission has 10 files that are each 1000mb, you will be able to upload all 10 as part of your submission. 

For more information on files and file types, please refer to the below article:

Requested Information "Any" file type Option