I just wanted to share a great tip that I just set up for myself today.
I have a Gmail account (and heaps of invites if anyone wants to send me an email at trisha @ genesislifecoaching. com requesting one) and I recently installed Gmail Drive from http://www.viksoe.dk/code/gmail.htm
It's great! I can use all my Gmail storage space to store back-ups and share files easily - because Gmail Drive turns your Gmail account into a 'virtual' hard drive on your computer that you can treat just like a normal hard drive - copy, paste, delete, etc.
And best of all, it's 100% free.
One warning though - Gmail may at any time change and you may lose access to your files, so only keep copies on your Gmail Drive.
Also, I had to reboot my computer for it to work. But it works ok now.