I read that the USB socket in the glove box is the only one in the Highland that allows you to upload media to the car’s infotainment system AND download/store media content from the Dashcam, with regards to the dashcam, I believe the stick or SSD that you use to record the footage needs to be plugged in at all times to ensure everything is captured. If that’s the case I’m thinking a Hub would be a good addition as it would allow you to leave the USB/SSD plugged to record the dashcam and add more USB devices as required.Why do you need anything more than the USB stick? Are you going to view the hundred of hours or boring ass video? You only need the 10 seconds before an accident.
It’s also worth mentioning the thumb drive provided with the car in the glove box has limited storage capacity, and because the car continuously stores the footage from the cameras while the car is even parked i read it was recommended it replace it with something with a higher storage capacity so that the footage is available to you for an extended time without being overwritten, which is what happens when the supplied thumb drive is full