After activity ended, I didn’t press Save by mistake. Any chance to retrieve data from the Forerunner 245 and add it to the training program on the iPhone?

There is a small chance. Immediately turn the watch off, attach it to your computer, then only turn it on when you're ready to try one of the file recovery tools as mentioned in this thread - how do I get my activity back if I delete it?

seilogrampI do appreciate your help. I'll give it a try! To be honest, I didn't realize one could connect the Garmin to a computer; I guess BlueTooth should allow that w/ no prob. Many thanks.
You would think it wouldn't be difficult to modify the software to offer an option to save the activity that just ended, or to get back to the Save point, etc. Best.

Not Bluetooth. Connect using the Garmin supplied USB cable to your Windows or Mac computer. You can try a manual upload at that point. Might be beneficial to also install Garmin Express.

How Do I Manually Upload an Activity I Recorded to Garmin Connect?

If you get any message other than Import Complete, then there is a problem with the file. In that case, please 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 reputable file sharing service, such as OneDrive, Google Drive, Dropbox, make the file public, then paste a link to the file in your post.