Syncing data from mobile to remote server

Today I was looking for a way to easily backup data from my Android mobile phone onto a remote server. While there are plenty of apps that can be used to send data to a cloud service (and, obviously, to Google), there aren't many that can be used with one's server, or at least without a certain amount of fiddling (like Termux).

A seemingly good one I've come across is FolderSync.

Pros:

Cons:

#tech