billyo, i'm by no means an expert on this stuff. But i have 3 externals. My big WD MyBook, which is my security external. You've seen these, the big black heavy things. I keep that one at home. Then i carry two of those slim red WD Export usb hard drives for my shows. One i use, one i save for backup. Those two are identical, even the same color. Still i have to rebuild one, when downloading my new Chartbuster Monthly CD+G's. So, who knows. I know it's a pain, but i rebuild before every show. At my age, i can't remember which drive i used last..lol i know... i know....
