enable sharing the binary file and use a larger buffer

[qidu]

Description

Update an examle for trasnfering a binary file

Links to any relevant issues

Open Questions

Change checklist

• [x] I have performed a self-review of my own code
• [x] I have made corresponding changes to the documentation ~~I have added tests that prove my fix is effective or that my feature works~~ ~~A changelog entry has been made in the appropriate crates~~