I bought a 500GB external USB2 drive (not expensive). A little batch routine (remember those?) creates a "dated" folder and copies all my stuff over every week. I clear out most, and keep a few, just in case. Quick, easy, no faff, and works fine.
Stuff I really care about (pix of the family, mostly) gets copied off to CDROMs and left up in the Norfolk cottage, with daughters, and so on.