As a storage backup location, default options are Ubuntu One (5 GB free space) or you may install support for Amazon S3, Rackspace, ... Other default options are FTP, SSH, WebDAV, Windows Share, Custom Location or Local Folder.
Encryption of backup files is optional but highly recommended for personal files, as it makes it safer to upload to remote servers or cloud services and you do not have to worry about their safety and trust unknown random employees with access to their servers.
A simple folder backup of directory containing about 15 PDF files, automatically encrypted and stored using files with .gpg suffix looks like this on the remote server:
Directory listing in Ubuntu One
https://one.ubuntu.com/ > My Storage / ~/deja-dup/computername
$ sudo apt-get install deja-dup
Add Amazon S3 option
$ sudo apt-get install python-boto
Add Rackspace option
$ sudo apt-get install
Restart (exit and start again) the Déjà Dup application to see the newly installed backup options.