Originally Posted by Len Todd

For some reason Spektrum still has not fixed the IX20 so that you can use a separate SD card to transfer models w/o using additional software. There is an internal SD card/folder in the IX. Somehow this complicates the process and a potential fix. PITA! Bluetooth is the best way to transfer from one IX to another IX. But the two Txers do in fact have to be the same software rev. You could also use the USB cable to transfer models to a computer and then transfer them to the second IX. Another PITA! You have to wonder why they even have an SD slot in the IX. However, there are a lot of nice features on the IX that make giving up the SD card transfer a worthwhile PITA!

Best advice is to go to RCGroups and read the 400+ pages of IX20 posts, if you have the time. Maybe start at page 200 because those pages are based on comments and questions about more recent software revs, etc. Or, ...Try searching the thread for specific issues, etc. They have answered almost all of your questions there.