Well, my little Buffalo mini-station (http://www.amazon.co.uk/dp/B000UEFQ1O http://www.amazon.co.uk/dp/B000UEFQ1O) is pretty small, and has a lot of other stuff

Well, my little Buffalo mini-station (http://www.amazon.co.uk/dp/B000UEFQ1O http://www.amazon.co.uk/dp/B000UEFQ1O) is pretty small, and has a lot of other stuff on it, so I'll be carrying it anyway, but as per my final paragraph the option of just loading up on a few more SD cards is one I've considered. I'd just like to minimise the loss in a disaster scenario (such as everything I'm carrying getting stolen). Hardware can be replaced, photos can't.