MN4 app is using a ton of storage on my iPad, and weirdly when I just deleted a bunch of the MN study sets, the storage in Settings for MN actually went up?? What are my options to reduce storage size for the app? For example: can I delete documents without losing the associated excerpts in mindmaps? (One thought I had was to delete a bunch of docs, if I can keep the mindmap without it getting scrambled.) And: if I want to export some study sets and store them somewhere else so I can delete them off of MN: a) what’s the best way to reduce size? I find exporting as pdf makes for a monstrously huge file, when I just do a basic pdf export. Are there other options that make the export manageable? Thanks