I need back-up

I have been buying a new goodies for my digital scrapping again but up to now I am still downloading them. How slow is that? Yes, I have been moaning about how slow my connection here, its because, my PC has full of crap files that need to be deleted or at least uninstall them. However, some files may need back-up so what I actually need is hubby to take a look with it since he is the computer expert to connect my hard-drive and save all my data files in case my computer will crash anytime then I have nothing to worry about - like losing all my save documents and kits. What can you suggest apart from I need back-up?