Western Digital My Book Premium 500GB USB/FW 400 Ext Hard Drive
Works as advertised
I use this drive as a backup on my Mac.  Periodically I take it out of the closet and attach it to my Mac through the Firewire port.  I copy everything from my Mac hard drive to the WD 500, then I turn it off and put it away. <br /> <br />BTW, I reformatted it for the Macintosh to improve speed and reliability. <br /> <br />No Problems.  No Muss. No Fuss.  Works exactly as expected.