FYI: Garmin will let you upload FIT files directly into Garmin Connect on your computer. This will automatically populate the Garmin Dive app on your phone. Navigate to "connect.garmin.com." Log in. Click on the cloud with the arrow running through the middle located in the upper right hand corner of the screen. Click "import data." From there you can manually import "Garmin Activity Files (.tcx, .fit or .gpx format); Fitbit® body or activity data (.xls, .xlsx or .csv format)." (Quoted from Garmin Connect's upload screen.) You must find the files on your computer (or on a device connected thereto including your Descent) and enter the path for upload. It's a pain. It is possible that activities, including dives, recorded on devices that save in one of the formats listed above can also be imported, but I haven't tried.