A:AnswerWherever you can get USB power from should work. If you just have bare power wires going to the mirror, you'll need to buy a third party DC converter to turn it into USB standards. In my experience, those have a high failure rate in a vehicle because of all the vibrations.
A:AnswerYes, oldest recordings are automatically deleted once the SD card is full - unless a recording was flagged with crash detection or the user hit the record button, those are saved until deleted by the user.
A:AnswerRight now it starts at $10/month with discounts if you pay a year up front. But it's optional, you don't have to subscribe if you just want to record and save to the local SD card.
A:Answerit doesn't need wifi for basic functionality. But if it has wifi access, it can auto upload to the garmin cloud service (subscription required for that)
A:AnswerIt records to a removable SD card that you need to provide. It can go up to 512GB max card size. Make sure you buy a card that is fast enough for constant recording, and the high endurance ones meant for video like this last much longer.
A:AnswerYes, the dash camera can be detached easily from the mount and connected to the computer. You can also simply remove the MicroSD card and read from the computer as well.
A:Answerthere is for the Garmin Vault subscription to save clips to their cloud, but it's optional. without it, you can still record and save everything locally to the SD card.