I save it in my external HDD : ) How about you?

I use an extral hard drive too and I also email things I'm currently working on to myself (incase I forget my hard drive on a certain day). I have numerous pen drives knocking around too, but sticking with old faithful (HDD). Which is, (on another topic) one of the best/most useful presents I've ever received :)

I use this software that automatically uploads to the cloud, because I would forget to keep saving the latest versions otherwise.

Dropbox worked very well for me.

Dropbox... brilliant piece of software.

2 different external HDDs and a USB pen drive. I always have a copy at work and home then. :)