If NBF refers to "new backup format", I use the legacy backup format.

As requested

Interesting . Somehow this change escaped my attention.

1. I see the message when I click "Edit" at the bottom of an existing plan. This brings up the "Welcome to Edit Backup Plan Wizard". I then click "Next" and this is when the message pops up. See picture.


2. Agent Version: I don't know how to answer this question
3. The plan was created 5 years ago using the Wizard. That's all I know.
4. Amazon Glacier tier: It was called S3 Glacier but I think now it's called S3 Glacier Flexible Retrieval