I let the pc store person persuade me to buy an exclosure and a HD to create a usb external drive instead of waiting for a pre made unit.
Being a brand new HD i have to create a partition and format it but win2k wont allow me to create the partition.
I go to MyComputer(right click) > manage > disk management , and right click on the unallocated space graphic. The wanted menu option " Create partition" is greyed out !!
An hour of googling only turned up that this can happen if you are not logged in as administrator but I AM
At least I think i am.

How can i know for sure?
Please help