Do all external hard drives require a power supply with positive polarity?

Franck_DernoncourtB to Tech Support@poweruser.forumEnglish · 1 year ago

I am shopping for an AC/DC power adapter for an external hard drive, and I’ve noticed that the power supply required for the couple of the external hard drives I looked at is always with positive polarity. This made me wonder: Do all external hard drives require a power supply with positive polarity?

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