Then you have access to all the files in those drives via the web browser or via iPhone/Android apps.
You also can sync your files to this plug device by installing a client software on other computers (much like dropbox) but your are files are always private and never stored on the cloud.
The TonidoPlug2 is running ordinary Debian Squeeze 6.0 with full apt-get support. And in any case, you can also boot the TonidoPlug via a USB or SATA drive and setup whatever you want.
Some of the more popular ones:
1. Sync your files to the TonidoPlug, ala a private "Dropbox"
2. Stream your music whereever you are
3. Remote access to your files and photos
