Peter, along with everyone else here, I can't stress enough the value of backing up.
My computer crasshed and I lost a lot of my
photos of my children as well as a lot of important information....what I do now, is to backup what ever I need to with CD-RW....
they are cheap and you can use them over and over again..back up every couple of weeks or whenever you add new information you feel need to backup...good luck....
Tony Rome