Comment by JJOmeo

Google for contacts and small stuff. Photos get copied to a home server which itself gets backed up. I've used rsync front-ends, non-standard apps which I don't like (PhotoSync). It's been plain SMB shares accessed through CX Filebrowser recently, I haven't cared to get fancy. I'm always using this SMB share with various devices anyway because tons of things "just work" like VLC on Chromecast.