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I think the version numbers are only useful in determining whether your device is up to date, or if there's a bug in the new firmware you might want to revert to an earlier version. Aside from that, those number are irrelevant and certainly are not a basis for comparison between different series.
Garmin automotive units have gone through a slow evolution of features. Typically each new series has something slightly different. Looking back, the Nuv 600 series did not offer multi-point routing and did not record or display a track log. IIRC, those features were added with the 700 series. Then another series came along and added the speed limit display, lane assist and junction view came after that and so forth.
Around 2010 they completely abandoned traditional garmin multi-point routes and replaced them with "trips" that could only be created on the device itself. All the new models were unable to either send or receive routes from Mapsource or Basecamp. Why they did this is still a mystery. But there was such an outcry that they introduced one-way route transfer from the computer to the gps in the next Nuvi series. This was still very limited and the whole "trip planner" fiasco continued until 2013 (IIRC) when they finally brought back the full functionality of the old Nuvi models.
The 2012 models introduced an interesting feature of custom dashboards that actually allowed you to design your own map screen. Then in 2013, they removed that feature and never brought it back. http://forums.gpsreview.net/discussion/26442/making-customized-dashboards/p1
They did the same thing with custom speed limits, where the user could enter their own limit if it was missing from the map. Advanced pedestrian mode was something they introduced in 2010 (IIRC), it provided a different map screen and cursor and allowed routing via mass transit if you purchased a special map. A few years later they discontined those maps and removed the pedestrian mode from the new models.
In 2010 they introduced the Nuvi 3790 which was thin and looked like an iPhone. They made a big deal over this, it had its own website. And it was very impressive, I had one. True 3d view including three dimensional terrain and buldings. Completely new user interface. There was a new 3d map browser that used the multi-touch screen to tilt and rotate the map. They continued refining this flagship model with the 3490, 3590 and 3597 and then just dropped it. None of the current models have 3d terrain AFAIK.
For the appearance of the main map screen, the biggest change came in 2013 with a different "flatter" look (apparently Apple-inspired) and tabs that slide open. I think this has been retained on the new "Drive" series.
Now the changes to the newest devices all seem to be based on a bluetooth connection to your smartphone, things like finding parking places, etc. The newest hardware does look nice, with big bright screens. Have only played briefly with them in the store. The problem is, the dedicated GPS is dying a slow death and their sales are way down. They will need to stand out from smartphones somehow. I suppose an obvious way is making 7" screens which would be a bit too large for a phone. ;)
Personally, I'm very happy with the Garmin StreetPilot Onboard app on my iPhone 6s+ which has a 5.5" screen. The user interface is very similar to a 2012 Nuvi, with some features borrowed from other models.
Regarding your question about which models will be supported... roll the dice and that's about the best way to forecast what Garmin will do. See the examples I cited above, they were all offered on Garmin's flagship models and announced with much fanfare only to vanish later with no explanation. ;)
So, just to be clear, do you have a file with a .gpx extension that you copied to the card? How did you convert the waypoints to a .gpx file? The card needs to be formatted as FAT32, which would normally be the default for a 16gb card. It could be a defective card, that is not terribly unusual.
Try copying the file directly to the internal memory of the 62s and see if that works. If not, then there may be something incompatible insided the file, there seem to be different "flavors" of GPX. I would try opening the file in Garmin Basecamp or Mapsource and see what happens, if it doesn't work there, then it may not be compatible with Garmin's implementation of .gpx You can open .gpx files in a text editor and see exactly what's inside for troubleshooting.
It shouldn't be necessary to "sync" anything. When the 62s starts up it should automatically read any data in a .gpx file on the card or in internal memory.
I'm not aware of the POI Converter software but it may be it that is taking the POI name and forcing it down to old IBM computer standard with an 8 character size limit.
I'd suggest you give Extra POI Editor a shot as I haven't heard of this problem using it to convert OV2 to CSV files. You can find EPE at https://turboccc.wikispaces.com/Extra_POI_Editor
If that doesn't work and you don't get any more response here, I'd try POI-Factory.com where there are a lot of POI experts (many of them members here as well ;) )
CN EU 2018.10 NTU now available for download
Interesting that they sell a version with lifetime City Navigator maps. https://buy.garmin.com/en-US/US/p/539722/pn/010-01607-05
I guess nobody would want to use it in the city though, and anyway it only costs $800 so what do you expect? :D
According to Garmin, this is the coverage of the UK and Ireland map. As for the rest, I'd say that's between you and the place where you bought it…
Win10 is known to have issues with some Garmin devices in mtp mode. The normal fix is to set your device to mass storage mode. To do so:
1. Start NUVI by itself and go to Volume Screen.
2. Press the upper right hand corner of screen for 10 seconds.
3. The Developers Screen will pop up
(may see Configuration and Settings, if so select it)
4. Scroll down to MTP SETTINGS
5. Change from AUTO DETECT to MASS STORAGE
6. Shut down NUVI and connect to PC
7. It should now connect in mass storage mode.
Just use the program I linked to above, it was written to address this exact problem (although I'm not clear whether it works on Sierra) http://www.javawa.nl/cleaneject_en.html
FWIW, my main computer is a MacBook Air, also a quad core Mac Mini for video editing and a base model Mini for a media server. Have been using Macs since 1985 and Apple ][ since 1978.
However I use a Windows machine for making maps and managing Garmin devices. But you have to cut Garmin a little slack on any 60csx issues. They did not even support that Mac at all when it was introduced. :)
It looks like Garmin has introduced the 2017 models: https://buy.garmin.com/en-US/US/cOnTheRoad-cAutomotive-p1.html
I have not figured out what all the changes are, but one thing I see on the DriveLuxe and DriveAssist and DriveSmart is this: "Built-in Wi-Fi® for easy map and software updates". Also looks like they integrate with the Garmin Smart watches. And they have apparently dropped the LMT and LMTHD designations now showing as DriveLuxe 51-S.
Don't know if this will help or not on the "Event saved" issue, but I suspect the message is related to the dash cam functions. I found this in the user manual, but I am not familiar with this model, so I don't know what you can or can't turn off:
I would probably try turning some alerts off one at a time to figure out which one is causing the frequent Event Saved alerts.Enabling or Disabling Advanced Driving Assistance Features
You can enable or disable advanced driving assistance features in the camera settings (Camera Settings).
Select Settings > Camera.
Select or clear the check box next to each warning or alert.