The Garmin Connect mobile app doesn't support exporting activity files. You need to use the web version to download your activity file.
Open connect.garmin.com in your browser
Select your activity from Activities
Click the Settings gear icon (⚙️) at top-right
Select "Export File" to download the activity file
Share or open the file directly in RunCut
Garmin packages the original .FIT file inside a compressed .zip archive. Simply tap the .zip file or share it directly into RunCut — RunCut automatically extracts and parses the .FIT file natively without manual unzipping!
Yes. Connect your Garmin watch via USB cable to a Mac or PC, navigate to the Garmin drive > GARMIN > ACTIVITY folder. All your activities are stored directly as raw .FIT files.