There's no mention of what, specifically the warrant was a search for. In general, a warrant for search should include specifically what is being searched for. And generally only evidence of that or a major crime are punishable under the warrant or should be.

For example, they're searching for child porn, and they find you're pirating TV shows... they can't prosecute for the pirate shows. The exception is usually only for something like murder/manslaughter.

IANAL, and this is only my understanding. The warrant itself may have been excessively broad or generic though.