For a Backup Drive, which External USB Hard Drive have you found to reliable and last for more than 1 year ? Do WD MyBook or Seagate Goflex hold up for more tha 1 year ? --OR-- Do you find that you need to go with a USB enclosure and standard desktop internal drives for a reliable solution that will last more than 1 year ? If yes, then what USB Enclosure Brand do you use ? -- OR -- Do you instead use a "Drobo" OR a Wireless Router with its gigabit port connected to a "NAS Backup Drive" (with Raid) ? ... If yes, which brand have you found to be reliable ?