How do I enable Member Folders in Plone 3?

This FAQ was verified against Plone 3.1.7.

For security reasons, member folders are disabled by default in Plone 3.

This FAQ describes how to re-enable this functionality in 19 easy steps.

To re-enable them, set the check box named Enable User Folders in the Security control panel (@@security-controlpanel), reachable from Site Setup.  Specifically,

1. Log into your plone site as a site manager.
2. Click Site Setup.
3. Click Security.
4. Ensure "Enable User Folders" is checked.

Thereafter, any users that log into the site will have member folders created automatically.  However, there will be no link to them from the Personal Bar (as was the case in Plone 2.x). To re-enable this link, you must add the link using the ZMI in portal_actions.  To do this, you will make a copy of the preferences link and customize it to create a My Folder link. Specifically,

1. Log into your plone site as a site manager.
2. Click Site Setup.
3. Click Zope Management Interface.
4. Click portal_actions.
5. Click users.
6. Put a check next to Preferences and click tho Copy button.
7. Click the Paste button. This creates a new content item called "copy_of_preferences".
   
8. Put a check next to copy_of_preferences and click the Rename button.
9. Replace "copy_of_preferences" with "my_folder" and click OK.
10. Put a check next to my_folder and click the Top button (this makes the My Folder link appear before other links in the personal bar).
11. Click my_folder.
12. Change the Title to "My Folder".
13. Change the URL to "string:${portal_url}/Members/${member}".
14. Check the "Visible" checkbox.
15. Click Save.
    

Congratulations.  Your members should now see a My Folder link in the personal bar and be able to create content within their folder.