I'm gonna use "Déjà Dup", it is a really convenient back end of
duplicity.
Pros :
It is really easy to setup
It securely encrypts and compresses data
Permit scheduled backups
Allow incremental archives with space efficient (only record the parts
of files that have changed since the last)
Con :
Only work with Linux
Overall it have more pros than cons for me ;)
https://launchpad.net/deja-dup
bye