would it be possible to add the shaw expander HDD to the *C 530?

No it connects via eSATA which the 530 does not have. To go even further the USB port on the back of the 530 is not enabled for use either. You will have to wait for the 6xx series whenever they come out for any possibility for an external device.

figures, thx for the reply

sorry for the link, wasn't meant as a retail link, but as a informative description.