Hi there, is it a new sata hdd? mind list down below thing?
1. ur hdd brand and capacity
2. ur window OS.

If it is still new and you havent formatted it, try go to my computer, right click manage and go to disk management, have a look over there if it detects your new hdd. If yes, please format it there.

Hi there,
check in your bios and see whether it is detectable.
Make sure your SATA cable and Power cable not loose.
Thanks

are you saying that in bios your hdd is detectable?
But if it is a external harddisk,
i dun think it will show in BIOS.

Erm, when you plug your HDD to usb,
did your window make the USB thingy plugged sound? like ding dong?
then wat is the led color of your HDD?
red or green?
I am afraid your HDD is underpower to run.
Can tell me more syntom?

From the information you give me, there is no problem or what so ever that it work, with the LED indicating green.
So, when it got ding dong, did you feel your HDD run?
You might have look into your Device Manager and see if your HDD is under the USB Serial Bus Controller.
It should have detect your HDD as Mass Storage Device.

Another way round for this is that you can troubleshoot it by taking the HDD out of the casing if you know.
Then test it barely using SATA cable and adaptor.
I hope you get some idea on what i tries to say.

Some thumbdrives that can act as a USB floppy with a separate floppy drive when you insert it should be able to work but i'm not sure. I remember someone told me that worked.
My guess is somehow you don't have the proper drivers for the casing then...

Might wanna check if that casing comes with a driver or something. Though its kinda odd.

You might want to pop in the XP setup disc and let it search for drivers from there, perhaps it would work that way.