The reason why Susan's drive is not working is that she has connected the drive to a USB 2.0 port, which does not have enough power for her drive.
<h3>What is the USB?</h3>
USB is a short acronym for the original word called a Universal Serial Bus. USB is a connector interface for connecting a computer to peripherals and other devices.
USB comes in different specs such as the:
Some of the characteristics differences between USB 2.0 and 3.0 are:
A USB 2.0 requires 480 Mbps for data transfer speed while USB 3.0 requires 4800 Mbps.
A USB 2.0 has the ability to use a maximum power of 500 mA, while USB 3.0 can make use of up to 900 mA.
From the given information, It is stated that the drive requires a minimum of 400 Mbps and at least 900 mA;
Therefore, it implies that the drive is supposed to work with a power of at least 900 mA for it to work.
But since it is not working, we can conclude that the drive is connected to a USB 2.0 port (500 mA) which does not have enough power for the drive.
Learn more about the USB port here:
brainly.com/question/13714615