I haven’t done much of it, but maybe trash guide can give you an understanding of how you would do it

https://trash-guides.info/

That’s a very good question 😂

The post is from 3 years ago, around that time, where facebook bought WhatsApp if my memory serve me right.

I use Syncthing with my Seedbox and use a VPN on my Debian VM running syncthing, then share the folder im syncing over smb on my local network. (I Use FeralHosting) This is just one of many ways to do it.

SFTP is fine but is like having a helmet on while racing but not using a seat belt.