I have a nuvi 1340T which I purchased new in the U.K. it came with a pre-loaded European map (CN EUROPE NT 2010.10) I have been trying to load the Thailand Street Map NT v10.0 EN but without success. The Garmin folder of the unit contained just one file garmindevice.xml there were no .img files installed anywhere, I have unzipped the unlocked TSM v10 file and renamed it gmapsupp.img and moved it to the Garmin folder in the internal memory but it is not recognised.
What am I doing wrong?
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