On 4/27/2020 12:04 PM, Frank Slootweg wrote:
If there are 580,000 files in the News folder, then you've probably
configured your Thunderbird News account(s) to use one file for each
article instead of one file for each newsgroup.

If so, it's probably best to bite the bullet and convert to one file
per newsgroup. That probably needs an export and (re-)import and
probably will be time-consuming, but at least then you'll solve the
actual problem.

FYI, my setup - not Thunderbird - has nearly a million articles, but
only some 600 files.

Yes, that is exactly the problem, I was getting at. Does Thunderbird
have a new news file format available? My assumption was that
Thunderbird only does 1 file/message? What's the option to convert?

Yousuf Khan