I don't know how you sleep at night Dave,
I'm a belt & braces back up junkie.About every four months I copy everything to dvd's, It takes about two hours & costs about £4, Money very well spent don't you think ? Acdsee lets you copy all images in a folder & sub folders ie My Pictures & I just keep feeding the thing dvd's until it's finished (18 the last time) Good quality Infiniti disc's cost about £6.50 for 25 & burn at 16 speed. I should hate to loose ANY of my images just because Mr Gates' software decides to throw a wobbly.