Dash cams are a bad option, cops have and will delete footage that doesn’t fit their narrative in court.

Mine is more an exercise in if I could than if I should. I’m using a 1tb disc for os and cache with a thunderbolt, 4 disk jbod nvme enclosure for storage. If I was in need of more storage I’d probably go with a usb jbod ssd enclosure for power efficiency reasons but as is a bit less than 5tb has been fine for my needs.

Subarus are pretty easy to kill, the telematics unit sits under the head unit and comes out in about 15 minutes, 30min and a $60 harness total for the job