If possible it’s a good practice to involve your manufacturer in your design process from the beginning. The best way to do this is to simply add them as a collaborator on your project (you can give them read-only/viewer access).
Alternatively you can enable private URL sharing from the Project page (License --> Edit) and simply share the project URL with them.
Your manufacturer can then grab the files they need from the “Download Associated Files” tab.
You can always download the files yourself and send them over. You’ll typically need:
- Gerbers
- NC Drill files
- X-Y Pick and Place
- Dimension drawing
- Bill of Materials