I getting a bizarre problem with USB external storage devices. This is not the normal flash drive problem, though it occurs with both flash drives and an external DVD burner. Basically, when I first boot up, any USB storage device is visible. However, when I attempt to write to the device (either through drag and drop to the flash drive or Roxio burner to a blank DVD/CD)...the copy operation begins...a few files are copies to the media...and then I get a "Cannot find the file/path" error. The second symptom is a "ghost" USB Mass Storage Device that appears even when there is nothing attached to the computer. It has 0 GB of storage and cannot be accessed. Anyone else hear of a similar problem? I have several other USB devices (printer, wireless mouse, etc) that are working fine.