Portable USB Hard Drive - 40 GB

EXTERNAL CD Writer (USB)

What I mean to ask is, which one would be more advantageous to purchase? A CD Writer or an external hard drive? For starters, an external hard drive has the large storage capacity, and on the other hand, an external CD writer allows me to keep writing to CDs, in effect, unlimited storage, at a small cost per CD.

Which one is better?

Thx.