This image shows custom folders under the crawlerName folder.

crawlerName and app: These folders are created when the crawler is created in the Site Capture interface. The /app folder contains the crawler's CrawlerConfigurator.groovy file.

archive: This folder is created when the crawler first runs in archive mode. Time-stamped subfolders store archive captures.

logs: This folder is created when the crawler first runs in either static or archive mode. www: This folder is created when the crawler first runs in static mode. It contains the statically captures site. The next crawl in static mode will overwrite the current site capture.