[hide]http://download.garmin.com/tw/download/MapUpgrade/TWN_CN_2012_30/W1/1230_Type1519928.exe[/hide]
For Nuvi 200, 83MB contains just the Taiwan Map 2112.30

The 351MB file is for Nuvi765 and Nuvi 760
The 252MB file is for Nuvi 1350
The 1.21 GB file for 3790T is correct