Switching from MK1 to MK2 without losing any data

Hi all!

I will upgrade from the MK1 to the MK2 in a few days and wanted to see if there is a way to both backup all my MK1 data and also "upload it/merge it" to the new MK2. I will sell my MK1 once I get the MK2, so it would be ideal to find a way to keep all the data I´ve gathered throught the years (activities, waypoints, dives, metrics, etc).

I´ve found the following instructions in other garmin forums, but I was wondering if there was a more automated and swift option available: https://support.garmin.com/en-GB/?faq=hWholZ8uPZ6PboXu5Nf7d6 

Finally, if I were to factory reset my MK1 to eventually sell it, would the synced data/activites already stored in the garmin connect app still be there or will it dissapear?

Thank you very much for you help!