The photos were really wonderful.
That was until the wife recorded a video, then wanted to delete it to make a bit more space, at which point she was faced with this choice.

I mean who describes their photos as 'frames', you either frame a photo, or deal with frames of a film. Which, as she'd just recorded a small video, compounded the confusion.
Anyway, one irreversible slip later and 700+ photos of the holiday suddenly disappeared.
Katie felt awful, and was very nearly in tears, full of apologies.
Tears should NOT be caused by poorly worded interfaces not making a very major action extremely clear, that's just crap design. The choice is right, the wording of the choice is totally wrong.