I have a few simpletech external hard drives and I have debating on upgrading my hard drive on my Macbook for sometime now. Simpletech uses major brands for the drive, but use their own enclosure. For example, my 250 and 320 gb drives use a Western Digital drive and my 500 gb is a Hitachi drive. I got these drives really cheap and I like the looks of them. Anyway, if I pull the drive from the enclosure, I know that I will void the warranty with Simpletech. But...will I have any type of warranty from the actual drive manufacturer? Will Hitachi honor the warranty if I put the 500 gb in my laptop? I just read that the Macbook aluminum holds the 12.5mm drive and this will save me some money ordering a new drive. I have the 1tb Buffalo mini NAS, but it would be nice to have more space and take more movies with me without the need to download/stream.