I have an old Dell Dimension 4400 with a 20GB hard drive. As you could imagine it is full. I am adding a usb 2.0 pci card and would like your thoughts on a new hard drive. External makes sense to me due to the computer's age, but I am concerned about usb choking down speed. An internal hard drive would work, but if i get a new computer later on it wont use the old IDE interface. Thanks in advance for your answers.