STORM keeps both access and error logs for each site. These are stored by the webserver that has served the request, either Apache or NGINX. Each log file is prefixed with the name of the web server and whether it is an access or error log.
These logs are refreshed each day and kept for 14 days. Any log files beyond this are deleted to save disk space.
The logs are kept in /home/storm/logs/. Each website has it’s own directory.