What is the purpose of the twelve pins interface of my WD disk

WD External Drives WD Portable Drives
2

WD use it on most of there Portable Drives … it seems to be a “proprietary” connection (well, not ‘consumer standard’)

anyways … the question has been asked before, read here

(there seems to be a way to connect it … but requires some soldering and wiring skills)
see: fzabkar’s link for more info on the page