My vehicle has HW2 (July 2017 build) which means it doesn't have the necessary hardware support for the dashcam functionality. I'm on V9 (currently 2018.44) and just for grins I grabbed my music usb stick and put a TeslaCam folder in it, in case it actually does have cam support and put it back in my vehicle. The dashcam feature did not show up (unsurprisingly) but the usb media no longer showed up either. It seems that if a usb stick contains the Teslacam folder it treats it specially even if you don't have the necessary hardware support. I suspect that HW1 and even pre-AP vehicles will encounter the same issue.