I have several folders within my profile folder that are associated with old email accounts which I have deleted from thunderbird (I no longer even have access to these accounts). When deleting them, I moved the associated inboxes to local folders. The old folders occupy a substantial amount of hard disk space (2+ GB). Is it safe to delete these folders manually, or is there any chance that they are somehow associated with the local folders (it would appear not to me, because I can see where my local folders are stored elsewhere, but every post I have seen about deleting profile folders seems adamant that deleting them should not be necessary)?