Want to look at your Garmin activities in Explore? Good luck. I have wasted hours on this and am getting nowhere.
The only way to do this (if the activity is not already on one of the few products that syncs with Garmin Explore) is to export all activities from Connect and then import into Explore. You have to request this export and a few days later you will get a link for a file that has all of your Garmin info. Navigating through this file you find a number of folders that have .fit files. You need to convert these manually and then import them into Garmin Explore.
Things that go wrong:
1 - Why do we have to do this at all? What isn't this synced automatically from all devices between Connect and Explore? Strava does this with Garmin data, why cant Garmin?. Why does Connect and Explore use different file formats? Why why why..
2 - When you download your fit files most of them are 1Kb in size. No idea what these are but they are not activities.
3 - The only way to convert the fit files to gpx for Garmin Connect is to download a converter from a third party and write a batch file to convert all of the fit files (otherwise you have to do them manually one at a time)
4 - When you have done all of this the next step is to import a batch of converted gpx files into Explore. What you find out then is that contrary to the Garmin instructions, the Explore website only accepts one upload file at a time. So after wasting all this time you are basically stuck with no reasonable way forward (unless you import all files one at a time, i have thousands)
5 - There is no process to stop duplicates occurring in future imports.
6 - The export from Garmin contains no useful information such as Ride name etc.
I am so over Garmin, every year they seem to get worse while the rest of the industry is producing increasingly competitive solutions. Garmin nowadays reminds me of GoPro, relying on their brand instead of improving their products and support. A rubber ring on my Garmin chest heart monitor perished this year and was only a couple of years old. The only solution Garmin could offer was to buy a new heart rate monitor from them. Its getting ridiculous.