It's a Lacie 1TB backup disk, and it just stopped working, in that it doesn't power up. I guess there was nothing wrong with the disk itself, and it's just the electronics that somehow fried. I tried taking it out of its casing and connecting it directly to SATA, but still no life.

I've got all Leo's early childhood photos there from the ages before he was 4. It's a bit sad. But I'm hoping that I can send it to a recovery service once I have enough money to spare.