|Can we presume this is a USB connected external drive that does not require any other power source?|
If so is it USB 1, 2 or 3 ?
Has the drive worked previously on this PC? does it work on any other PC?
Does the USB port work with other devices?
What are the specs of your system? Is it laptop or desktop? and did you mean Toshiba? It is only a small matter but if you don't spell things correctly we can misinterpret your question. Especially if it comes to model numbers. ( those are always helpful so when replying how about you tell us )
Goin' Fishin' (Some day)