Looking at the dump it can be seen the zumo has previously been updated on a Mac. Do a complete backup of the file system and importantly a backup the [Only registered and activated users can see links. ]. Then [Only registered and activated users can see links. ] and check if the problem still exists. Only if unchanged, do this: Reformat using ONLY [Only registered and activated users can see links. ] on a Windows PC. While still connected to the PC create an empty Garmin folder in the root of the device, then safely disconnect from PC and let the zumo boot. Re-connect to PC, open Garmin Express to update map entitlement and most missing files.