I have a 1st Gen iPod - the 5 GB model, the one released way back 5 years ago. I replaced the battery a while ago so it's in great working condition ... 18+ hours battery life, etc. The thing is that my music collection is growing day by day and it will soon exceed the 5 GB capacity of the hard drive in there (and I really want to be able to carry my whole library with me). I know that 1st Gen 10 and 20 GB models were later released, so I thought I could buy a 10 or 20 GB hard drive somewhere that would be compatible with my old iPod to give it a little more capacity without having to buy a brand new iPod with a smaller battery. Does anyone know where I could find the brand model number of the hard drive in my iPod? Or just some place I could go to get a new one? Because that would rock.