I have an iPod with 20GBytes space. I have used 12 so far. So, my question is what happens when my music at my iTunes library reaches.. lets say 25 gbytes? It will soon happen, that's why I am asking. iTunes lets you decide which songs will remain outof the iPod and which not, or it does this automatically? Or even worse, it tells you that your songs do not fit into your iPod, forcing you to delete some?