Need gps help, my 76cx and nuvi won't read sd cards

Discussion in 'GPS 101 - Which GPS For Me' started by oldmachines, Jul 28, 2017.

  1. oldmachines

    oldmachines Adventurer

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    I have a 76cx that I used on my bike with tracks for the CDT and I really like it. I also have an old nuvi 265w that I use for my car. I recently bought a sandisk 4gb micro sd card and tried putting the gps kevin TAT route on it which I had no trouble downloading and puttting on the card on my pc. When I installed the card into my 76cx it didn't show up as a map option, like the unit didn't see it. I put it in the NUVI, same results. Hmmm. Tried some open mapsource stuff. Same results. Then I bought a Garmin City Navigator North America NT 2014 micro sd brand new sealed in the Garmin packaging. Same results, won't show in either gps unit. I have done a search here on the 76cx and I just can't figure out what is wrong. I would think my 76cx unit has a problem EXCEPT that the NUVI doesn't read the cards either. Anybody know what I am doing wrong???
    Thanks

    Brad
    #1
  2. ohgood

    ohgood Just givver tha berries !!!

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    have you tried writing to the sdcsrd with those devices ?
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  3. oldmachines

    oldmachines Adventurer

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    I think so, at least I tried running it through mapsource but I can only get the GPX file to open and transfer and it doesn't transfer to the sd, only the internal memory. The img file won't open on my PC, it says the file is corrupted. On another note, I borrowed my father inlaw's brand new Etrex and tried the sd card on there and it didn't read it either. I have asked for help from GPSKevin through his website but have not heard anything yet.
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  4. mcnut

    mcnut Long timer

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    So I'll offer up some variables based on your posts.
    It sounds like you may be trying to use downloaded data sourced from GPSKevin. There is a good chance that the GPSKevin files are .gpx files and I don't think a 76Cx can 1) open/import a .gpx file directly, or 2) read/open a data file directly from the SD, the SD being only for map products and archived daily track logs (write only). I'm fairly certain you should be able to open the .gpx files in MapSource and transfer them to the 76 internal memory, keeping in mind the saved track limitations of the 76 (max 20 saved tracks of max 500 points ea). Might be time for a 78 which address these issues.
    Obviously this doesn't explain why the CN SD didn't work as it should have. Does the 2014 CN not even show on the show/hide list accessed from the Setup Map tab?

    Bruce
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  5. Woody2627

    Woody2627 Grey Wobbler

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    I believe the 60 series units could not read a anything above the first 2 gig on any card, maybe the 76 has a similar problem. They are basically the same unit in a different case.
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  6. 250senuf

    250senuf Long timer

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    +1
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  7. oldmachines

    oldmachines Adventurer

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    Thanks guys! I was thinking about getting a 78 anyway so I guess I will. I was able to open the GPX file in mapsource and transfer a small portion directly to the 76cx in a test. I'm still wondering why the etrex didn't read the sd card with the download from kevin? The etrex did read the 2014 CN but it did not even show on the show/hide list on my 76cx or nuvi.

    Brad
    #7
  8. mcnut

    mcnut Long timer

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    I think one of the firmware updates for the 60 boosted the SD size limit. Fairly certain I have used 4 g cards.
    If you haven't, update the unit to the latest firmware.

    Bruce
    #8
  9. lwood10

    lwood10 Adventurer

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    I use Garmin for work and record several thousand waypoints each year for work. Garmin has made it very difficult to continue using mapsource. I had to go to Basecamp and lost quite a few waypoints in transition from mapsource to Basecamp. Anyway, try using Basecamp and it may help you some. Worth a try. Good luck. I use a 76 model Garmin but without a sd card option.
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  10. 250senuf

    250senuf Long timer

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    Could you clarify please since Mapsource is not a database type of program. I think it would be easier to lose things in Basecamp. Take a look where you kept the "lost" waypoints when using Mapsource.
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  11. lwood10

    lwood10 Adventurer

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    I may not have described my problem well. I had many old waypoints from my mapsource days that did not move easily into base camp when I exported the gpx file. Also, when I try to update locations of existing waypoints it sometime changes the name of the existing waypoints and it gets very confusing to me when I am trying to manage approximately 6000 waypoints for a database of trees for contract work I do. I export these files and often some waypoints are missing. I have slowly been getting all the points into base camp from mapsource but still have issues with some of the waypoints when in base camp. So now I just use base camp although I found mapsource easier to work with. I don't know if I'm making anything clearer but I have found less issues by just working within base camp.
    #11
  12. Marcham

    Marcham Been here awhile

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    Are the older units compatible with microsdhc cards? Do you have have an old microsd card you can use? How did you format it?

    Sent from my SM-T700 using Tapatalk
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  13. Woody2627

    Woody2627 Grey Wobbler

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    You can use larger cards, but it could only see the first 2g. You could be right about the firmware update though.
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  14. 250senuf

    250senuf Long timer

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    I put the microSD card into an SD adapter which goes into a USB SDcard reader into the PC. Right click the Drive it shows as, Format, FAT, Default Allocation size.
    #14
  15. Marcham

    Marcham Been here awhile

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    If you recently bought the card it's probably a microsdhc, not a microsd... That may be your issue. Older units are not compatible with high capacity cards.

    Sent from my SM-T700 using Tapatalk
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  16. mcnut

    mcnut Long timer

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    Keep in mind that the only large files utilized by the 76 are the maps (.img) files and there is a 2020ea (?) map tile limit. Maps of the day usually exceeded the tile limit before using 2 G of the SD regardless of chip size.

    Bruce
    #16