I don't want copies of outgoing attachments saved in "sent" mailbox. Tried Attachment extractor and it sort of worked and then deleted a big bunch of emails.

Question

I have been using Thunderbird for a few months and after a while it started doing really weird things. I found out that it was 98% full according to the progress bar at the bottom.
I downloaded attachment extractor add-on and it worked ok and freed up space and NO percentage or progress bar was shown for a while until of course it filled up again after just a week or so.
All I want to do is stop Thunderbird from saving a copy of the outgoing attachments in the "sent" mail folder. It's totally unnecessary as I keep the original files in a folder and don't need another copy. I specially don't need copies filling up space and causing Thunderbird to make a big mess.
Is there a way to change settings to do this and if not PLEASE tell me why there is not.
It makes much more sense to me to have the option of NOT saving exact copis of every outgoing attachment.
It also saves the signature file, a separate copy for each outgoing email. This is silly and also absolutely unnecessary.

Answer 1

I see now that there is a check box near the attachment window that can be used to NOT save a copy of the attachment in the "sent" folder.
Thanks.
Just one thing else I noticed that after checking the box ALL options for message text etc. are grayed out so it is best to check box after completing the message body.
Thanks again. It saves a lot of space. Now it's just the 1000's of junk mail every day eating up all the space. I should likely set it to automatically delete junk mail after a couple of days but I'm not sure if I accidentally mark good mail as junk sometimes so it's good to keep it around for a while just in case something has to be unmarked as junk. I don't know how I could get to the junk list if the junk mail is deleted.