Summary
Hide files by creating a file called:
.htaccess
Then the file's content is:
Options -indexes
More insights
If you do not want the directory listing to be listed when no index file is present you can create a .htaccess file at /usr/home/rauterkus1/public_html/swimisca.org/wp-content/uploads/.htaccess
Options -Indexes
This would result in access to the directory that does not contain a valid index page (index.html, index.php, etc.) returning a 403 forbidden error.
This will not prevent images or other content from being called directly but it will prevent such directory listings from being publicly available.
