I am using an external hard drive to do the transfer. I set it up on my old
computer, started the transfer and went to sleep. When I woke up, I tried to
finish the transfer on my new computer, but when it asked me to find the
"from old computer" file, and I found it on my external hard drive, I got a
message that said: "Please select valid file". I did it again and again and
I got the same message. What could that mean? Please help. I am very
frustrated.

I'm transferring from a Dell Dimension 4700 Desktop to a Dell Inspiron 1721
Notebook