Activity lost during update

Did you get any error messages while syncing or did it hang up at all? You can force an upload if you have the ttbin file using the steps below. If there is no ttbin it is lost, the history on the watch is just summary data, there is no detailed data behind it.

1. Exit MySports Connect on your computer (you must use a computer to reupload – right click on the tray icon and select Exit).
2. Locate the ttbin files:

PC:
The ttbins are saved in a dated folder for the date of the activity under C:\Users\{User Name}\TomTom MySports\{Watch Name}

Apple Devices:
a. Connect your iOS device to your computer and wait for iTunes to open.
b. Select your iOS device in the iTunes sidebar.
c. Select the Apps tab and scroll down to File Sharing.
d. Select MySports.
e. The ttbin files are listed on the right hand side.
f. Right-click (Mac: ctrl-click) a file to copy it and save it to your computer

Android Devices:
a. In Android, the ttbin files are stored on the internal SD in (/sdcard/TomTom_MySports/[serial number of watch]/workouts/uploaded/).
b. Copy them to your computer

3. Place the ttbin files in the serial number directory:
Windows: C:\Users\[user name]\TomTom MySports\[serial number]
Mac: [home dir]/TomTom Sports/[serial number]
4. Restart MySports Connect and connect your watch
5. Go the Settings page (click the gear icon on the top right) and press the 'Try again' button to re-upload the files.

I hope this helped answer your question. If so, please mark it as a solution so others can look for it if they have the same question.