I am going to pick up an external hard drive ASAP and have a few questions about doing so. The first thing I want to use it for is copying a lot of files to before I wipe a Dell Dimension 8100 PC that I am about to clean install Windows XP on (again). This PC is equipped with USB 1.0 (1.1?) along with all other standard connections. Once that is finsished, I'd like to use the drive on a newer PC (as yet to be purchased) that will likely have USB 2.0 as well as Firewire connections. Are there external dives that support USB 2.0 and/or Firewire that also can be used with this older Dell PC? Thank you.