The ZODB is a full object database, and data inside it is not stored as files. You could compare it with, for example, postgres: it is not possible to just turn your postgres data into a bunch of files.
There are several options to extract data from your ZODB that might work for you:
- you can enable the FTP service for Zope. See the zope.conf configuration file for details
(it has many comments explaining the options). Once you have FTP enabled you can extract
most data with any standard FTP client.
- there are several data import/export products available for Plone. Perhaps one of those
will work for you.
Unfortunately both options rely on you being able to run Zope, which you state you can not do. I am guessing that is due to Plone requiring Zope 2.10 or older, which only run on python 2.4. If so you could try to compile an older python version and install that on your system. Python fully supports having multiple versions installed at the same time, so that should not break anything else on your system.
I am afraid it is not possible to extract data from the ZODB without running any python tools, and to be able to load Plone data from the ZODB you will need to have a working Plone environment so ZODB can load the python classes for the data stored in it.