MODEL: SPP34-12 0/5.0-2000
INPUT: 100-240VAC 50/60hZ 1.0A
OUTPUT: 12.0V 2000mA
5.0V 2000mA
Those are the details from the back of my adaptor for 2011.5, a hard drive that is gathering dust and likely to become my next external back up. The new external hard drive is much smaller and does not need an adaptor - deriving its power from the computer.
I would mention is that the 2011.5 hard drive has an American plug, which is useless in Australia, and I have to use a very bulky plug adaptor to suit our three-pin plugs. Actually, I think it is illegal to sell American type plugs in Australia. I notice that the importer of American-manufactured(?) MIGHTY BRITE music-stand lights has replaced all the American adaptors with Aussie ones; as opposed to the ones I purchased over the internet from Jamey Aebersold, which require the plug adaptor. Maybe a tip for the PG Music shop to look into plug requirements when they export to various places in the world. America and Canada do very well with internet sales into Australia and it would be a shame to upset the authorities. Just a thought, although I suppose it is a bit of a pain having to stock different adaptors for different places in the world.
Better to stick with the external hard drives that do not require a power adaptor.