Just coming back to this again… It’s grown to 15GB since I deleted it in January. I had it set to raw for every setting in the advanced tab, but noticed I missed the client side hashes in the internet tab. Changed it now, but I have doubts it’ll do anything.
Still confused how the hashes for ~10GB of files can take 15GB to store. It’s emails, so lots of small files, but surely the hashes are still smaller than even the headers of the emails.