Some USB 3.0 hard disk can''t work because it need high power. (you need to connect the extral power cable).You can test it with usb flash disk first.
Easily connect your Thunderbolt-equipped Mac or PC to an USB device with the Thunderbolt to USB 3.0 Adapter. Small and compact, it connects to the Thunderbolt port on your Mac or PC computer, giving you an extra USB 3.0 port. Set-up is easy.
Simply connect an USB device to the Thunderbolt adapter, and then plug into the Thunderbolt port of your Mac or PC.
Use the extra USB port to connect extra peripherals. For even greater expandability, add the 4-port USB 3.0 hub and access up to 4 USB 3.0 devices at the same time.
If a customer is using windows, drivers are needed.

Technical Details

Product Details

Package Dimensions
Width : 4.02 inch
Height : 2.01 inch
Length : 7.01 inch

Shipping Weight: 3.2 ounce (View shipping rates and policies)

ASIN : B015F6ODUQ