[johnramsden]

I've been using the syncthing for years, and in my opinion it's so much better than a solution like Dropbox. If you want, everything can be done on your lan, it offers encryption, compression, and the ton of customizability. You can synchronize directories individually, and ignore certain files. It's from a centralized option like Dropbox, since it's not using a single location to store your files, but if you want a "centralized" set up you can still make it work by using a server which all your clients connect to instead of connecting them individually.

Great project and I would highly recommend giving it a try.

[mhxion]

rcloud (https://rclone.org) is great too if you want an open source client solution for syncing to the commercial storage service. If you can setup your own server for rcloud like you'd do with Syncthing, rcloud can be enough.