Firstly, I would like to start by saying I order and received my hyperdrive c usb hub for MacBook in a nice and timely matter, being in Australia the post from the states was quick and easy. This seemed to me to be the pick of the c hubs for MacBook for my application. Matching MacBook colours, through charging, 2x 3.0 USB ports, micro and sd card reading slots, the hub offers all necessary ports for me that don't come factory built into the MacBook. However, mine will not read my 2tb portable WD passport hard drive. Plugged in, all lights are on, (on the HD,) but then an unusual clunk sound from the HD, and the drive does not pop up in finder. Worried that my portable HD may have died on me, I plugged it into my iMac, to be pleasantly surprised that the clunk noise had gone and everything on my HD was still there. After a bit of googling on the clunk issue, it seems that this is how the HD acts when not given enough power to the drive. I then plugged in my Apple usb c to usb adapter with no dramas, the HD was 'clunkless' and showed up fine in finder. Again I tried plugging it into the usb c hub, again no luck. Final try, I shut and and rebooted the MacBook, plugged in the usb c hub and HD with no luck once again. Next I thought if it's a power issue, I'll plug the charger into the hub, along with the HD and see if that somehow gives the HD the necessary power to read and be recognised by the MacBook...success, it had worked. Now, this quite annoying.. The whole idea of purchasing the usb c hub was to be completely portable, and have all the functions that the hub offers on the go. I use my portable 2tb HD very often, and it seems that the only time that I will be able to have the HD plugged in, is when the MacBook is also charging through the hub. Has anyone else got the hyperdrive c hub for MacBook and found this issue? I am quite disappointed, and have sent hyperdrive an email, to see if this is normal behaviour for the hub or if it is (hopefully) a faulty hub. There is no mention that I could see on their website stating that larger portable USB HD will not work due to a lack of power, and with portable hd's only getting larger in capacity then it seems that this hub would be useless in such application in a couple of years. Just for the record, my thumb HD worked fine. I also tried the 2tb HD in both USB ports. Does anyone have any thoughts on this? Much appreciated.