if you are referring to usb drives or scan disk cards if its a scan disk card it must have device to plug it into (camera ,phone,navigator) if its a usb drive you must plug it into a usb port if you want to use the usb drive click start click on my computer you should see your drive it will be listed as something like G: or H: or if its in a device it might be seen as a mass storage device click start control panel administrative tools computer management device manager scroll down universal serial bus controllers you could see a yellow question/exclamation mark ? ! or a red X you will need to update the driver right click to reinstall drivers if you can see your usb drive but its not working if your computer came with a motherboard disk the drivers could be on it ports(com&lpt)right click update driver if this fails to fix the problem check the USB leads that attach to the motherboard usually red white green black make sure they are securely seated and have no dust build up on them dust will cause static and a lot of unforeseen problems for a computer and its parts hope this helps you
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