Your boards
Every board you create or open in this browser is listed here automatically, with how long each one has left before it is deleted.
Saved in this browser only
This is not an account. Clearing your browser cache or site data wipes this list, and a board with no link is unreachable forever. The boards keep running on the server, you just lose the only record of where they are.
Board passwords normally stay in this tab's session storage in plain text. If the browser blocks session storage, a newly entered password stays in page memory only and is lost on reload. They are not encrypted, are cleared when the tab closes or you lock the board, and are never written to the export file. Keep a separate copy if you need recovery.
Board thumbnails contain only anonymous column and card counts; column labels and card colors are not saved in the library.