Help for the right Power Supply

[manubart]

I unplugged the power supply of my two external hd and I do not know what is the right power supply of my

Elements 2 Tb WDBAAU0020HBK

for “power supply” i think this kind of object: 

http://www.google.it/imgres?q=alimentatore&hl=it&biw=1173&bih=823&gbv=2&tbm=isch&tbnid=ksPIizoBLL5N9M:&imgrefurl=http://www.etvision.it/schedaprodotto.php%3Fid_oggetto%3D203%26id_categoria%3D7%26id_sottocategoria%3D4%26produttore%3D&docid=7z_le0fZorDuLM&imgurl=http://www.etvision.it/upload_img/originale/1254307000.jpg&w=750&h=634&ei=NrZPT5zsCM31sgbIssGEDA&zoom=1&iact=rc&dur=4692&sig=114126873959233124171&page=1&tbnh=140&tbnw=165&start=0&ndsp=24&ved=1t:429,r:11,s:0&tx=88&ty=77

What is the right Ampere? Someone could write the full specifications, so that I can recognize it?

Thanks

[Joe_S]

See if this link helps http://wdc.custhelp.com/app/answers/detail/a_id/1378/session/L3RpbWUvMTMyMDE3MTc3OS9zaWQvak9TMVcxSWs%3D

Joe

[manubart]

Thanks Joe!