Yeah I’ve definitely gotten that out of it.

It backs up my entire phone to my server.

I’ve been using folder sync pro for ages and ages https://play.google.com/store/apps/details?id=dk.tacit.android.foldersync.full

It basically syncs a folder from your phone to a folder on your home servers share.

I think it was paid… But it’s been years so I couldn’t tell you.