Save public stories and highlights before the day runs out.
A story is gone the next day and there is no archive on your side. Paste the profile link or the username while the story is still live, and every frame comes back as a file you can keep.
You do not need a direct story link — the account name is enough.
Both kinds of frames download the same way, at full resolution.
The account owner gets no viewer and no notification. Your device never talks to Instagram.