[Zope] too big data.fs

I have redhat 9.0 with zope on it. the size data.fs is 3.2 GB. my question is 1. how can find to size of folder and file inside data.fs, So i can ask the idiot who upload large file to zope to delete it. 2, Recentlt i often get troulble of losing network connection of my redhat server, is there any relation between the large data.fs and the disconnetion? Thanks