(WD My Book) How can I tell which cords are for drive?

Hello! I have multiple external HDDs with their own Micro-B and Power Supply cords, but they are not distinguishable from the ones that came with my WD My Book 4 TB. How can I tell which Micro-B and Power Supply cords are the ones that came packaged with the WD My Book?

Have you checked here and maybe place your topic there too.
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My suggestion is, if you have a label maker once you figure out what they go to make a label for each cable etc.