I solved the problem with a hatchet approach. Went into Safe Mode, revealed all invisible files, and deleted a lot. Reinstalled SS app. Was able to attached an external HD to share.
What I learned is I likely did not have to do all that, which trashed my in progress downloads, chat history, list members, EVERYTHING!!! While in safe mode I think I discovered the problem and if I had noticed it before I trashed everything I would have been okay. In Ventura the dialogue window to share a file/drive disappears behind the SS app browser window. If you don't notice that, and try to share again, won't work. But, if you minimize the browser window and find the original share dialogue, you should be okay.
That's my theory.