In standard configuration pinEdit calls editSave method after pressing save button in toolbar.This methods initiates a post to server in background without reloading editor and passes the content and the current URL.The content is passed in parameter "html", the URL in parameter "URL".The page that is used for posting parameters is called "adapter"
(can be specified in editor/config/config.js in parameter "target" for PHP,ASP,JSP or "SaveAdapterUrl" property in ASP.net)The configured file is called and saves the content to file system.There have to be write rights on file level to allow saving files.