Need to download Comcast emails in folders to Thunderbird client

[JoeM]

I'm trying to back up my Comcast emails locally to Thunderbird. I've been able to DL all the emails in the inbox but can't figure out a way to DL the sent emails and those in named folders.

I built a filter that DLs emails with keywords in the subject to folders I created in Thunderbird but it's only pulling them from the Comcast inbox. Is there anyway to download from a Comcast folder to a folder of the same name in Thunderbird or do I have to move the Comcast emails in folders to the Comcast inbox and use a filter in Thunderbird to then assign them to local folders?

Also is there a way to drag and drop from the browser to Thunderbird? I can't seem to find any info .

TIA