So, another tool I'd like to present, Dropbox.
Dropbox is an online file synchronisation service which does take place on Amazon Servers.
The files are encrypted and stored securely, also with quite high performance.
Nice part? 2 GB of space are free.
You get 250 MB for doing the Tour,
and another 250 MB if you followed the invitation of another person.
( Oh, and yes the other person does get 250 MB as well.. )
Just in terms, heres my invitation link, would be nice if you would consider using it: http://db.tt/tIYzeey
So, how does it work?
In a nutshell: You create your account, download and install the client, enter the data and you're done.
You got an "Dropbox" Folder now on your Win / Mac / Linux Machine which is synchronized.
As soon as you move files to this folder, Dropbox starts to upload the data.
If you change data, these changes are also commited directly.
So far, so good.
The magic starts happening as soon as you install the client onto another pc:
From the moment you start copying files into the folder on one pc, these are also synchronized to the Dropbox Folder on the other one.
And to make the thing perfect:
There are also clients for Android and iPhone as well as an "GUI-less" Version:
Thats right, you're able to install Dropbox as "Backupmedium" to an Headless, Commandline only Linux Server.
( http://wiki.dropbox.com/TipsAndTricks/TextBasedLinuxInstall )
So - I really can recommend it after using it for some months already, so I would suggest you to test it.