Through port forwarding also perfect on the go usable.
Meanwhile I use the DiskStation for the following things:
* Holiday Photos with Photo Station
* File management for me and my wife, rights management
* Synchronisation (DS Sync) various folders on tablet and smartphone
* Storing notes (DS touch) - app on mobile phone wherever you go.
* Backup: on the DS hangs an external plate, once a week is saved it
Each of even just a bit of what is on privacy should purchase a DS.