Purchased WD My Passport Portable HD - 500 GB - Both 3.0 and 2.0 compatible. Plugged it in to the front USB port and then tried the back port but error 850 comes up stating our device is not supported by Dish. Was told by Dish TA that it is probably because it is a portable HD and doesn't have it's own power source. This didn't make sense to us. Is the issue because it is not strictly 2.0 compatible? We are not able to view any DVR programs and a new receiver (not sure which model) is being shipped. Would like to save the programs before we switch to the new one. Any suggestions or advice would be greatly appreciated!!