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up vote 12 down vote favorite

I read the power supply should have 0.7A and that RPi by itself requires around 0.4A-0.5A. So, what if I want to connect an external USB SSD/HDD?

External SSD can require 0.5A (and maybe more), so should I use a power supply with more than 0.7A? Will higher current create any problem?

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2 Answers

up vote 13 down vote accepted

You can't power a USB hard drive on the RPi, as the outputs are restricted to 140mA. Consider an externally powered hard drive.

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up vote 1 down vote

Some USB hard drive enclosures are powered by two USB cables. The RPi alone cannot power one of these, but there are powered USB hubs that can. I have seen a RPi with an external HDD powered by this hub. I do not remember the brand/model of the HDD enclosure.

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