Unix commands like tree, du ... would answer this question very quickly.
Although I can't answer without seeing the content, my experience with PDKs allows me to tell that most foundries provide:
+ many tech libraries, may be with both CDBA and OA versions
+ embedded tools and utilities
+ doc, you quickly reach 100ds of megs of docs when you make screenshots ... etc.
Anyway, foundries provide far more information that simple components ...
If digital libraries, IOs, memories ... etc also shipped with the PDK (which normally is not the case), then you are likely to hit tens of Gigs.
Again, look at your Pdks, a few Unix command and Bob's your Uncle as they say here in Britain
Cheers,
Riad.