Export to TCX

volkaa said:

It is not clear how many times you need to select "Export to TCX" for the upload to be completed?

Normally just once. However, there were recently reports from multiple users telling the export function does not work for big files (generating a server error). I recommend reporting it to the Support, and in the time being before they fix it, if you need it urgently, you can export the activity in the default FIT file format (the first export option), and convert it to TCX (or another format) with an external tool.

4461422 said:

Links to the TCX files on the Fitbit web dashboard are in the export files

You are on a Garmin forum. Fitbit is another company, currently owned by Google (not Garmin).

On the sixth day, during the day, the process finally took place.