To get me started with Time Machine I hooked up a USB external drive enclosure with a WDC HD I had been using off and on for my PC. While this works, the drive makes noise and I have to remember to unmount and disconnect the HD every time I want to take my MBP anywhere. Could anyone recommend a better, quieter drive? Do all external drives need to do the two step process of unmounting then disconnect? What about using Time Capsule? I like my existing router and don't like the idea of paying that much for something that is essentially a backup device with a simple router but maybe this is a better option? Thanks.