thanks for responses.
yes I know. but the box I got was Only 3590 LT.
the LMT versions came soon after the original launch.
ok I see the format as noted in your post.
so which maps do I delete and copy the new updated maps?
do I do the same with the 3D and .JVC files and .ASR and .SID etc delete old and copy newer ones onto Garmin.
the new ones I have are all unlocked. would I need to update the .gma????
thanks
ED
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