This board is perfect for making a computing cluster or grid and USB 3 seems to be the best interconnect method (Fast Ethernet is too slow).
What is the simplest and cheapest way of attaching a USB 3 and power cable?
The LeMaker Guitar Base Board Rev.B is designed with the USB3.0 Mirco-B interface. Therefore, in order to connect to the USB3.0 HDD, you need to choose a USB3.0 OTG cable. For more information, please refer to the wiki tutorial at http://wiki.lemaker.org/LeMaker_Guitar:USB3.0 .
We are designing the base board Rev.D which can support four pieces the lemaker Guitar, and integrated 1000M switch chip, USB3.0 to 1000M chip. Meanwhile, you can extend your cluster based on more base board Rev.D through the 1000M ethernet port. We will produce the project board in next month.
Thanks for your support.