Since playing either FF Origins or FF Anthology (can't remember which now, I think it was Origins but I'm not sure) on the PS1 many years ago, I tend to create two saves in the first available slots, especially with big RPGs.

The reason being that when I was playing that game for the first time, as I was saving the game, there was a power cut. Had to start over. It then happened again. As I was saving. Twice in a row. Ggnskjgnakjgnakd.

So now I have two save files that I save to every time just in case a power cut happens while I'm saving.