I have a Seagate BUP Slim 1TB. It won't recognize it as an external hd. On Hardware management it shows as undetermined or something. I tried plugging it into different ports. I tried other machines and it is recognized on other machines -- even on the USB hub it has. Both machines are Windows 10. The drive itself is encrypted with BitLock but on my machine, it is set to automatically be readable without password input.