My USB stick does it too (2012 Terrain).
Seems it takes a second for the device to mount (assuming it mounts like a drive would in a computer) - and then switches to the USB stick automatically once mounted.
On my 2012, there is a "startup volume" option. Might want to check what you have it set to.
Seems it takes a second for the device to mount (assuming it mounts like a drive would in a computer) - and then switches to the USB stick automatically once mounted.
On my 2012, there is a "startup volume" option. Might want to check what you have it set to.