Hello,
Regards your comment about keeping history but deleting data, I suggest you convert your history into a Workflow. You could then delete the history and therefore all files attached to it but keep a copy of the protocol for future use.
Hope it helps
Best
Jean-François
Also is there a way a user can keep her history around as a record of what was done and be able to rerun it later, but still delete the actual data?
I don't think that is possible at the moment. Cheers, Bjoern