Which of Iomega's USB-male cables are for data (fat or skinny)?

[SmartphoneUser]

The Iomega model SPHDU2 has two USB-male cable/connectors.
Which of Iomega's USB-male cables are connected for data (fat or skinny)?

I want to read my Iomega external harddrive from my Samsung Epic 4G (Galaxy S2) smartphone.
I am connecting from the smartphone's MHL-female jack, using an MFL-male -to- USB-male cable, and a USB-female -to-USB-female gender changer, to the Iomega's USB-male data cable.
Which of Iomega's USB-male cables are connected for data (fat or skinny)?
And the other will connect to a power source.

 

[huldunet]

The Iomega model SPHDU2 has two USB-male cable/connectors.
Which of Iomega's USB-male cables are connected for data (fat or skinny)?

I want to read my Iomega external harddrive from my Samsung Epic 4G (Galaxy S2) smartphone.
I am connecting from the smartphone's MHL-female jack, using an MFL-male -to- USB-male cable, and a USB-female -to-USB-female gender changer, to the Iomega's USB-male data cable.
Which of Iomega's USB-male cables are connected for data (fat or skinny)?
And the other will connect to a power source.

The "fat" one has both 5V + and - and data.
The "skinny" one is for additional power 5V (+ and -)


FYI: USB spec says 500mA (0.5A) pr USB-port, and some devices require more current
than 500mA to work/power-up.