Hello,
The methods I know,
1. scp
pros: the native tool in the OS
cons: you will either input password or put key pairs into servers for authentication.
2. rsync
pros: it can transfer data by increasement
cons: you need to setup rsyncd server and make the correct authorization.
3. ftp/ftps
pros: easy to use
cons: need to setup ftpd server, and the way is not that secure?
4. rclone
pros:easy to use
cons: hard to setup (you may need a cloud storage for middleware).
For me I most often use scp + rsync. and what's your choice?
Regards,
Ken