Hi, I would like to add an external hard drive to my computer and have it be a second drive or slave drive. I have today learned that I first need to know if the USB ports on the computer are 1.0 or 2.0 I have a Dell desk top computer perhaps 4-5 years old, maybe 6. I am running Windows XP Professional and have a Pentium 4 CPU. I have 150Gigs of RAM at 2700 MHZ . I hope some one will please instruct me on how to determine what speed my USB ports are? Is there any thing else I should know before I purchase the external hard drive Thanks y'all!