Same thing happened to my venu sq, a circuits class and a 16 mile run completely disappeared from my watch along with a cool down walk. Watch is only 1 month old and I am tempted to return it as I need some reliability in my training, so hard to get any firm answers on here.
If you get any message other thanImport Complete, then there is a problem with the file. It is likely corrupt. Attach it to this thread. We can take a look to see if it is repairable.
Zip the file, then in a reply post Insert >> Image/video/file >> click Upload >> browse for file >> OK.
Or upload the fit file to a file sharing service, such as OneDrive, Google Drive, Dropbox, etc., make the file public, then paste a link to the file in your post.
