Localsend is absolutely my go-to. It is awesome.

iOS, computer, android, whatever, it just always works and is fast and everything is extremely user friendly.

I essentially stopped using kdeconnect except for its automatic clipboard and notifications.

Syncthing is a bit more complicated to set up, but that is what I use for “file sync” which in my view is different than file sharing which is different than file hosting like next/owncloud.