I have found out that RunGPS on WP8 devices can only save trainings in internal memory, cannot save trainigns to SD card. This is big disadvantage: after moving to new device the RunGPS loses one important feature: virtual training agains yourself. Due to that all my trainigs are left on the old device, the trainings log has gone, I cannot competite agains previously recorded training. My solution is to implement function to download trainings from the portal. It works like this: on the old device I upload my trainings to the portal, using already implemented method. After moving to new device I download specific training to the training log, with new desired funcion. This new function makes the RunGPS much nicer sofware then now.