I was searching around but found no answers about this issue: I have a folder, in my Gmail account, where I automatically (with filters) put mail with attachments and other characteristics... they are basically emails that could be deleted.
I periodically delete all emails form such folder.
However, some of them, which have also additional labels, are useful to me and I don't want to delete.
Is there a way of deleting all emails from a folder except the ones which also belong to other folders?
Another way of considering the question: is there a way to delete all messages marked with a certain label only and not with other labels?