No responses yet....
Limiting file size might be a cost issue for running the forums.
Other than that there could be options on how to make the file available, depending on what kind of a file it is.
- can file size be reduced?
- can the file be split into parts that are small enough to post?
- can the content be posted here as text and separate images?
- it is possible to save it in some cloud service like Dropbox, Google Drive, etc, and post a link here.