My trumpcard uses the original 40MB hard drive. And mongo is right, it is 8W not amps.... Anyway it was to large to run on stock A500 psu... It powered up at first but shutoff the HDD if i tried writing to it...
I use a 200W AT psu on it now, and connect the HDD directly to the psu.
I tried a 340MB HDD. but it wont mount that drive. Is there any limit in the trumpcard how large the disks can be?