I hope you all have your own back up methods, here are mine.
Photos get copied from the camera to the hard drive. Within a few days I have chosen which I want to use online and move the folder for that day to Drop Box, so they are stored online. Once this is done, I delete them from the camera. About once every 6 months I burn two dvds of all the photos since I last burnt a dvd, one a back up copy. So they are now in three places.
Photos selected to use for my blog go into a folder For Post. Once I have used them, I move them to For Upload and every so often I upload them to Flickr. After that, I move them to another folder called Blog Pics, and yes, it is a rather large folder now. Every so often they will also be copied to a usb stick when I am backing up other things.
When travelling, daily I copy the photos from the camera to, well in the past the notebook or laptop. I didn't do this when in Sydney with only the tablet as I didn't have the right connecting lead. Yes, I could have used wifi to transfer them, but I had never set it up. I have with the new camera and may well do it that way in the future, although just buying the right lead with the correct plugs would be probably be easier.
As for general backup, my system is absurd, mostly using usb sticks and who knows what stick I put what on. You can't write on them like you can dvds. I have an external hard drive which backs up the entire computer hard drive once a week, but I don't know if works properly or not. The external drive gets busy each Sunday night at 7pm, a time when one of us would be home and the computer on.
There may be one more post about photos and the camera but in this post, here are a couple of cloud photos I took and I am very pleased with them. It was a freezing cold day, with rain fronts arriving all day and the cloud formations were quite fascinating.