Back up watch

[slcpunk]

This may be a dumb question but how do I back it up to add a watch os4 and keep my achievements it how to back up when adding to new phone

 

[matrix07]

This may be a dumb question but how do I back it up to add a watch os4 and keep my achievements it how to back up when adding to new phone

Google (or Apple site) is your friend
https://support.apple.com/en-us/HT205189