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Garmin 310XT will not transfer data during sync

This is pathetic. I have yet to upload data for over a month now, on my watch and my fiance's watch as well. The ANT+ was working fine, then we swapped to Garmin Express and removed everything. It glitchy the first few times we transferred data a few months ago. It came to the point that I had to remove the device and resync each time to upload information. Now, a month later. I cannot transfer my data. My express service seems to be in an eternal transferring data state, on the first activity to load. I tried deleting that activity, thinking it might have corrupted, but still nothing. I have uninstalled everything garmin on my computer and reinstalled express. To no success, it is still hung up on transferring an activity I DELETED.

I am out of ideas, other than finding another company that doesn't have such pitiful software.
  • I am using Modern and Yes I've deleted the device from express and reconnected it.
  • Please remove the device from Express, choose to Remove it from Garmin Connect as well. This will not delete any activities already uploaded but it will clear the Sync menu in Connect. Use the instructions below to delete any remnants of the 310 from the computer.

    1. Delete the contents of the C:\Users\yourusername\AppData\Roaming\Garmin\Devic es\
    2. Press the Windows Key + R key together
    3. Type this exactly, %Appdata%
    4. Click OK
    5. Open the Garmin folder
    6. Open the Devices folder
    7. Delete the numbered folder (unit id of the fitness device)


    1. Delete the contents of the LegacyProxy folder located in C:\ProgramData\Garmin\LegacyProxy folder
    2. Press the Windows Key + R key together
    3. Type this exactly, %Programdata%
    4. Click OK
    5. Open the Garmin folder
    6. Open the LegacyProxy folder
    7. Delete the numbered folder (unit id of the fitness device)


    Restart the computer then add it back again.


    Master Reset on the 310XT if problem persists.

    310XT Master Reset:


    I only suggest Master Resets as a last resort but you have to pair the watch with Express again after the master reset.

    Curt