How to use syncthing for mirror the backup over the internet?

[SebGG]

Hi all,

i have a question regarding my backup system. I'm using cloudron in my private environment. I have a small nano pc connected with a second SSD drive mounted as my backup location of my cloudron. What I want to do is, mirror the complete backup data over the internet to another pc to have my data at another place.
My first idea was to use syncthing for that problem, but I'm not able to solve this, because there are problems with file system permissions and so on. Can someone help my with his or give me a hint?

cheers Seb