<appSettings>
<add key="MainDir" value="c:\SPMain"/> ----------------------------------Path for Backup of folders and files
<add key="Portal" value="http://win-ntebht5mcq2:43605/"/> ---------URL of sharepoint Site
<add key="Site" value="SiteName"/>----------------------------------------Site Name
<add key="ListName" value="ListName"/>----------------------------------List Name where files and folders are there
<add key="FolderDepth" value="3"/>----------------------------------------depth of folder to which we don’t need to delete
<add key="FromDate" value="23/09/2011"/>------------------------------- checking Folder Created date for Archive of files and folder
<add key="TillDate" value="23/09/2011"/> ---------------------------------- checking Folder Created date for Archive of files and folder
</appSettings>

If folder structure is
Folder1(some files)
Folder2(some files)
Folder3(some files)
Folder4(some files)
Folder5 (some files)

Folderdepth =3 means it will not delete Folder1, Folder2 and Folder3. But, Folder4, Folder5 and so on will be deleted.

For Deletion it will also check Created date of files and folders and if it falls in between “FromDate” and “TillDate” then it will deleted from sharepoint otherwise not.