回複:usb的硬盤我家裏的電腦上(win XP)上沒反應

Is the u***** drive powered by dc adapter or u***** bus?
Can you see the device under USB controllers inside Device Manager? Is it shown as Unknown Device?
Try other u***** ports.
Check system log after you connect the drive. Right click My Computer, select Manage, select System under Event Viewer. Can you see an Error on the first line?

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