Hdds are cheap and i plan to buy a 200-250gb one. I am currently doing quite well with my 40gb one but the only difference is that i have to clear out crap that ill never use again once every 8 months to a year or so.
If i had a 200-250gb hdd then itd take me about 2 or so years to get around doing that meaning i would be wasting a lot of space
Oh i write my music everytime im clearing a bit of space so that helps in music archiving according to my choices for that year or so too