It clearly still has Mass Storage Mode and if it's re-booting on loading maps then a corrupt map img file is probably the cause. Remove all map *.img files including any 3D building maps. If it still won't boot you'll need to reformat: [Only registered and activated users can see links. ]. It doesn't need Cure firmware because it still has MSM to be accessed by PC. You can replace its entitled maps with good copies from GarminExpress or get them from the Map Index here.