ASR files are useful only if you have 3490, a 2013 device and newer. These files are related to speech recognition (voice command of device) and only in American English as I heard (I guess only will function if you have a American English firmware).
Sorry, but seems nobody has these files to share...
Before someone asks: G2S files are related with TrafficTrends, your nüvi Garmin GPS automatically learns daytime trends for traffic flow to improve your routes and better predict your estimated time of arrival based on time of day and day of week. And you get free trafficTrends™ updates every time you connect your device to myGarmin. Only for compatible devices that use traffic receivers.
Hope been helpful.
PS: someone please corrects me if I made incorrect statements, I'm not a software expert...
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