Upload a file to or download a file from FortiWeb
The upload and download method has already been stated in Customizing&downloading debug logs and Collecting core/coredump files and logs.
Network Security 
Network Security
NOC & SOC Management
Enterprise Networking
Business Communications
Zero Trust Access 
Cloud Security 
Hybrid Cloud Security
Cloud Native Protection
Web Application / API Protection
SAAS Security
Security Operations 
SOC Platform
Advanced Threat Protection
Endpoint Security