How to get GPX files to work correctly in the BMW Motorrad app !

I've used the BMW Motorrad app for several years and it is, finally, quite a good, reliable navigator. However, importing GPX files, and getting them to work correctly, can be a bit of a nightmare. Hopefully this short video will help you succeed where, up to now, you may have failed! I'm using a Mac and iPhone, so apologies to any PC and/or Android users - some of it might be relevant though. Let me know in the comments if this has helped at all. And of course, if you have a better way of doing it, let's hear it.