Like Ryan says!CD is a bit more reliable than flash, but it's more secure than no backup!I use one of these internet things now, so there's a copy of mine on the internet if my PC ever dies. It took ages to do the first backup (liek 24 hours), but now it just does incremental changes (i.e. only stuff that's changed in the last hour), and I barely notice it happening. I've got about 16GB that I think I need backed up - I can get everything else form somewhere if the worst happens, so music, pictures and My Documents!