How Garmin watches reveal your personal data, and what you can do

This report examines how Garmin smartwatches store sensitive data in .FIT files that are often accessible simply by connecting the device via USB, outlines forensic techniques for extracting and analyzing that data (including a real-world case where Garmin data helped convict a murderer), compares Garmin's on-device security and privacy to Fitbit, Apple, and Samsung, and provides user advice to mitigate unauthorized access (syncing to cloud, enabling PINs, and protecting the physical device).