Same story as everyone else here. Left a 2.5" 7200 RPM HDD directly plugged in through USB for a few days, and the plug PSU died.
For people looking for a solution on the cheap (hoping it doesn't look like I'm advertising):
- PSU: PSP 5V 2A PSU, [EUR] or [US]) ~$10
- PSU connector, if you don't mind adding a hole to the plug, to switch PSUs and use one with more amps if needed: this one or this one ~$3
Ships any place but will take weeks, so no good if you're in a hurry. But if you're looking for a cheap replacement, and a PSU that *should* take 2 amps without ending up in smoke, that should do. Might even manage to fit the PSU inside the plug if you really want.
Been running my plug, with the plug powered HDD for a couple of days now, and the PSU is holding at barely lukewarm. Not requiring an external powered hub is quite convenient.
Of course, if that PSU dies, I'll let you know.