Originally Posted by njkayaker

As far as I know, the only devices (other than phones) that let you install non-company provided maps are those from Garmin.

The only reason it’s even possible to create non-company maps on Garmin devices is because people managed to reverse engineer the map file format. (There’s a newer format that hasn’t been reverse engineered.)

So, I very much doubt the Dura will allow it.

It would probably be a bad idea for a company to allow it anyway. It would reduce their options to make changes to their software and might increase support costs.