Mapsource Ver 7 and Nuvi 2757

My first thought was that you needed to put the device into MS mode but since you have other devices that come with MTP, that must not be it.

I am assuming that the 2460 and the 2610 are seen.

In spite of this, I agree that my first thought is that a switch in the 2757 from MTP to MS will result in a cure. I'd try this first before doing anything else. I'm not positive, but I'm pretty sure that my 2460 did NOT require the MTP>MS conversion.

Oh wait, the 2610 is a StreetPilot and came out way before MTP mode making me think even more strongly that this is going to fix Mapsource and the errant 2757--and the 2460 is NOT a MTP device:

https://support.garmin.com/support/searchSupport/case.faces?...

Please report back, billr, with results.

The 2797, like the 3597, will not be seen by Mapsource unless it's changed from MTP to Mass Storage mode.

This is done by going into the Diagnostic Page. To get there press the speed readout on the map screen and then press the speed/compass crcle in the center of the next screen for 5+ seconds.

When the Dignostics Page appears, scroll down to MTP Settings and tab it. On the MTP settings page tap Mass Storage and then Save. Reconnect the Nuvi to your computer you should now be able to use it with Mapsource.

Thank you folks so MUCH!!! You wouldn't believe how much time spent I doing "work arounds". I have been downloading the current.gpx file, adding he way points, and then copying it back into the GPS.
How did you ever come upon this solution?
In the mass storage mode, do I loose anything?
Thanks Ever SO MUCH
Bill

Thank you folks so MUCH!!! You wouldn't believe how much time spent I doing "work arounds". I have been downloading the current.gpx file, adding he way points, and then copying it back into the GPS.
How did you ever come upon this solution?
In the mass storage mode, do I loose anything?
Thanks Ever SO MUCH
Bill

We currently are in Northern Washington on Puget Sound. It has been over 5 years since our last visit. We had saved all the way points (well over 500) from all our travels but were having a devil of a time using them with the new 2757. We are RV'ers most of the time and depend much upon our GPS's. The 2757 has a great screen and is so much easier to use than the 2460. We had brought both with us and we using them both at the same time. Now we can pack away the 2460.
Thanks
Again
Bill

The issue of MTP>MS has come up so often that I don't remember who and how it first arrived here at The Factory, but it's been an issue for many folks, possibly even more of a problem for long-time Garmin users who moved "up" to a MTP device from an older MS-only device.

As far as I know, the main/only? advantage to MTP mode is safety--if you can't see the nuvi as a drive, then you can't delete critical files, format it by mistake, etc.

A little more:

https://support.garmin.com/support/searchSupport/case.faces?...

From "technically challenged" user point of view MTP mode is in fact much safer, as it doesn't allow direct access to files stored on device, so chance that they will make device unoperable by deleting files are much smaller. And this happened as we have here topics as such: "I formatted (deleted files from) my GPS and it doesn't work now. What I have to do now".

@grzesja, in my opinion it is only marginally safer.

In MTP mode, you can get to all "internal storage" except for the ".system" folder. So I can access Audible, Dashboards, Garmin, GPX, Help, keyboards,pictures,POI, Screenshot, Text Themes, Tutorials, Vehicle and Voice. I am not going to try it to prove a point, but I suspect I could make my unit inoperable by fooling around with these folders.

A number of us - when recognizing that someone has newly joined the site - make it a point to encourage a newcomer to make a backup first thing - and we have no idea at that point whether the newcomer is computer literate or not. My experience has been that it is not a question of if someone computer literate will need a backup, it is only a question of when.

Just my two cents worth, but those that arrive on the site saying they have "formatted" their device by mistake are very likely to be trying to bypass Garmin copyrights and get something for free that they should be paying for.

Someone overlooking a Dialog box that says

and clicks on OK anyway has not done so inadvertently.

Because "Format" is just above "Eject" in the right-click menu, maybe they think that someone would believe that the "click" was misplaced and the drive was immediately formatted. Of course, that does not happen - one has to press "Start" before the WARNING comes up.

I think of Formatting as a prelude to reloading. To me, this means that I have either a full backup image or an operating system disk ready to go after the format is complete.

Now, losing a file is not so hard to do. I have several time meant to copy a file by dragging it somewhere and let it drop somewhere I did not mean to (and then have to hunt for where it went). Such action is likely why some people trying to delete POIs .gpi files wind up "hiding" them from themselves in places like the "Text" folder. When this happens, the unit dutifully finds the .gpi file and shows it in "Custom POIs".

The latest version is 6.16.3. Where did 7 come from?

Windows 7 most likely. But the OP does need to clarify this.