PolGZ
16
I would go with what Roman said in the first post. Then you can just disable syncthing. If you want two folders to be the same without a server, that's what it is for! and it's really easy to enable on both devices. Just install the app, select the folder, scan QR and wait. Then disable the sync if you no longer want it (although, if you don't have a cloud server or do very regular backups... just leave it. Leave it on "only wifi and only while charging", and you just have an easy backup)