Duple

Duple is an app that gives you your own Private Dropbox at home, in one click. Just download the app on your devices, plug your USB key (any) to your internet router, and that's it! You've got your own private cloud at home.
Access your files from anywhere, store, share your files with your friends and family, synchronise and backup your files. You own your data as it resides in your home, no one else can access it.