There's a few ways to skin the backup cat. My personal solution is to run a robocopy job every night which backs up my photos on my PC workstation to a network drive. It only backs up changes so is usually pretty quick, even over wifi. It was much better over 1gb ethernet but my GF doesn't like cables around the house.
Anyway, I also have a smaller portable HDD which I do a backup to using another robocopy job every month or so. I try and keep this outside of my house. In case it burns down or something.
The drawback to this method is you have to be vigilant and disciplined with your offsites. Also, robocopy has no pretty interface. But I do this stuff for a living so it's a good option for me.
I know that some NAS devices offer a cloud backup but depending on how much data you've got, that might be more than they're offering and you'll need to fork out more. You could do some NAS replication between two remote sites if you could be bothered. I would be pretty upset to lose my photographs so I can be bothered
