And these are fairly modest in their demands. Most of the storage space is taken up by the programs I need which are writing programs and such-like Microsoft Office. But all I put on it is documents, a new song now and then, a few photos. I got the 128 11' Air about six or more months ago, started off using half the storage, and I'm only a little over half now. Which is to say, if it doesn't look like you're going to be putting a lot of videos or games or heavy-duty programs on your computer in the future, then 128gb should be just fine. Videos and games and big programs that deal with videos, games or heavy photoshopping is what you have to watch out for-these tend to take up a lot of space. It's surprising how little room things take up now-music, mail, documents, photos (I've got tons of photos), these really don't take up much space at all. Round it up to 20 to be on the ultra safe side combined with the 40gbs and we're talking 60gb.
So 5000 songs is about 16gb (give or take). An 8gb iPod can hold (give or take) about 2000 songs.
