This is the NapShare forum
Legality depends a lot on where you're living. If downloading/sharing copyrighted material is illegal in your country then you have to choose whether or not to do it!! afaik, risk of prosecution depends also on how many files you're going to be sharing. There are hundreds of threads about this, use the search & you'll probably find a few good ones (might have to weed out a lot of ranting though!!).
LW itself is legal, lots of people use it to share their own photos, videos etc & there's a lot of creative commons stuff that's legal to share.
Maybe you need to check out your country's laws regarding file sharing

I live in the united states,california and I am trying to just dowload music for fun you know to carry it on my ipod so is it ok to download?

afaik, it's illegal in the USA but search the forum... it's been discussed to death & you'll find heaps of threads & opinions.