The Zumo 345 has built-in MSV (MSV = software protection).
Model: Zumo 3x5 | HWID: 2435 | SWVS: 440 | MAP: Yes | GMA: Yes | MSV: Weak | GVS: Yes | File: Zumo3x5_440.gcd
If you want the device to see / read unlocked maps, you must first repair the software.
Otherwise, if you do not do this correction, then it does not make sense to discuss because you will not achieve anything.
Greetings!

P.S.
Zumo3x5_440.gcd - Garmin
Code:
Only the registered members can see the CODE Contents. Please Login OR Register.