This is a sad time for all of us who use Yahoo groups, as it is soon to close. This is something I personally have used for many years, well over 10 ! They were great for technical groups. But Yahoo has made the decision to no longer allow users to upload content to the Yahoo Groups site.
Beginning October 28th 2019, you won’t be able to upload any more content to the site, and as of December 14th 2019 all previously posted content on the site will be permanently removed.
You’ll have until that date to save anything you’ve uploaded.