What do you mean saying "My Zumo boots normal" - you have Garmin logo and then you have unit fully operational without maps only?
If you formatted the unit it will not load main screen and will not be operational.
I do not know Zumo software, but it should be similar to Nuvi units, so if you have Volume icon button, go to volume adjustment screen, press and hold upper right corner of the screen until you see hidden menu. Look for MTP Settings and change to Mass storage mode.
Same hidden menu is accessible in Nuvi from map screen and if you push the field which show your current speed then you will get screen with big speedometer. Press and hold in the middle of the speedometer and you will get same hidden menu.
But if Garmin express did not see your unit - something other went wrong...
Check your garmin drivers on PC, use other usb port. If unit is intact Express should see it.
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