I am replacing my ext hard drive. It is says it is usb 3, and it is usb 2 compatable. It comes woth a usb 3 cord. can I use my old usb 2 cord or do I need to use the new usb 3 cord that comes with it?
Generally you'll want to use the cable it came with, but if the old cable will fit, there shouldn't be an issue with using it. Just keep in mind that the cable can limit the speed. If you plug it into a USB 3 port, it will run at USB 2 speeds because of the cable.
MERGED QUESTION Question from jamesjpoche : "External hard drive replacement"
My old ext hard drive has a usb 2.0 cord. the new ext hard drive has a usb 3.0 cord that comes with it. The new ext is 2.0 compatable. Do I have to use the new 3.0 cord or can I use my old 2.0 cord?