How to get back all is flow and node when you have to change the homey box

I just have my homey box which has burned out when I plug it on a usb charger.
Don’t believe it was possible ! But it is.
I just buy a new homey box, but I would like to now how to get all my flow, node and product easly on my homey box.

Thank you for your help

I think all dependencies are here in this topic. Although you can’t really migrate. The restore is the same.