Even Customer Service couldnt tell me what the problem was, but buried on page 23 of the uConnect manual was the bad news. In todays world of offloading all responsibility to the owners phone, its ridiculous theres a limit of ANY kind - my 10-year-old Pioneer doesnt care whats connected. So, just some info for any of you who wonder why voice commands dont work with your USB connected devices...64gb limit!!!
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Grrrr....I guess the internal RAM isn't hackable...