[Zope] Error Packing Data.fs

Hi, I am getting a permission denied error when I try to pack the Data.fs file I found one answer to this in the archives, but I need a little more explanation. Here's the answer from the archive:

That is the point - when Zope is run under root, it automatically drops to nobody, and nobody doesn't have permissions to your Data.fs.

Error Type: IOError Error Value: [Errno 13] Permission denied: '/usr/local/Zope/var/Data.fs'

Oleg. (All opinions are mine and not of my employer)

My question is: Do I change the ownership of Data.fs to "nobody" or do I change the user Zope is run as? I guess I don't understand the consequenses of each option so I don't know which is the best way to go. Thanks, Eric.