On a PC : use yhe connect network drive wizard ( sorry this one is in French ;-).

Click on « open a web folder ... »

Click on next

http://metatst.dyndns.org/typo3conf/ext/meta_ftpd/webdav.php

Click on next

Enter the adress http://<www.youwebsite.com>/typo3conf/ext/meta_ftpd/webdav.php

Give your BE username and password for authentification