Unless you've had a pretty nasty computer crash and lost a lot of irreplaceable data then you don't really appreciate the value of backups. I had this happen to me a few years ago... I stupidly let a neighbour-from-hell near my computer and he fried one of my hard-drives (literally - the circuit-board on my drive partially melted as a result of him switching the 110/240volt setting on my power supply). The hardware is replaceable; I hand over some money to a shop and they will hand back a new computer. But that's not the problem. The data on my hard-drive was NOT replaceable and none of it was backed up. I lost hundreds of digital photos which had never been printed out or written to a CD: photos of cats now dead, of birthday parties, candid shots of friends and families. There were documents on there, emails, you name it... all gone forever. Since then I've been especially careful to backup my data at semi regular intervals. Nowadays, storage is cheap - what people lac...