Power Supply For My Book Model WDBFJK0030HBK

Hi,
I lost my power supply for my external hard drive My Book model WDBFJK0030HBK.
Does anyone know what the output power must be, apart from 12V? Is it 2000mA, 3000mA or…?
Thanks in advance for your help.
Kind regards
Allan

Looks to me like this will work.