one activity that doesn't sync ... ?

I have one activity from Monday, that doesn't want to sync...

Previous activities were always synced, also 2 activities from later (Wed, Thu) were sync correctly.

What's wrong with that one activity and how to sync it ?

  • IDK but it might be corrupt.  If I hadn't yet, I''d try syncing using a usb cable and Garmin Express on my computer. If that didn't work, I'd hope someone on this forum would explain how to rescue it by uploading the file and fixing it with one of the GPS file editing sites that can do this. 

  • In addition to what  mentioned, most activity issues can be resolved using FIT File Viewer. If you’re still having trouble uploading the repaired file, attach it to this thread so we can check if it’s fixable.

    • Zip the file, then in your reply go to Insert >> Image/video/file >> Upload >> browse for the file >> OK.
    • Or, you can upload the FIT file to a trusted file-sharing service like OneDrive, Google Drive, or Dropbox, set it to public, and share the link in your post.