[Zope] where does ZOPE store users created objects

Hello, Please i want to know the physical path on my Zope installation where Zope stored the objects (such as dtml methods and documents) created by the users. When i searched for the .dtml extension on my computer, I could not see anyone created by me or other users from the list of objects returned. My plan is to have two zope installaions running, i want the first zope installation to hold current information (bcos the data.fs is becoming too big, it is slowing down the site whereas majority of my users are interested in the current info while few will want to access the old info) and later run a python code that will cut and paste the old information into the second zope installation as soon as I have new ones. thanks