> How can I define the limit to be the folowing ?>
<http://www.example.com/folder.">;

You mean, to exclude "too far" pages, such as
<http://www.example.com/folder.folder2.folder3.page_name1.ashx> ?
Nest way is to use filters (Options / Scan rules)

For example, to exclude all named embedding more than two dots, use:
-* +www.example.com/* -www.example.com/*.*.*