I am certain that you cannot transfer between the unit and the tablet with a usb cable under iOS. I’d also be fairly certain it less so that is also the case with android.

But the Elemnt has Bluetooth. So does the your your tablet. If you have the route as a gpx resident on your tablet however you’ve done that you can then get it into the Wahoo app and then from the Wahoo app onto the element via Bluetooth without the internet. The Bluetooth connection does not require the internet, it is a point to point connection to the Wahoo Elemnt that replaces the usb cable and is its direct analog in this example.

So so if you have the route on your tablet and you’re sitting in the middle of the wilderness miles
from the nearest internet connection, you can get that stored route on your tablet into the Wahoo app and into the Elemnt directly. There is no way to do that over a cable from a tablet to my knowledge. This Bluetooth method should actually be more reliable since you don’t have to deal with normal cable issues. Neither the cable nor Bluetooth transfer require the internet.

i May be wrong about android although I believe it’s similar in this regard on most tablets and phones, but they usually do not allow the mounting of external drives or devices in the manner described by Wahoo because this represents a big security issue for a phone or tablet. So they don’t usually mount an external file system in the way you can with a computer. Android may provide a way to hack around that but iOS doesn’t.

Either way, the net is the same. Presuming you have the route on your tablet you can get it to the Elemnt without needing anything but you element and your tablet.