If your Aluminum 4-Port USB 3.0 Hub V2 is not being detected, start with the removable USB cable and the blue LED, since the LED only lights up when the hub is receiving power through that cable. The Aluminum 4-Port USB 3.0 Hub V2 draws all of its power from your computer's USB port, so a loose or low powered connection is the most common cause.

How to fix detection problems with the Aluminum 4-Port USB 3.0 Hub V2

1. Plug the included USB cable into the port on the left side of the Aluminum 4-Port USB 3.0 Hub V2, then connect the other end to a USB 3.0 port on your computer or laptop.
2. Look at the blue LED indicator. It lights up when the hub is receiving power through the USB cable. If the LED is dark, the hub is not getting power.
3. Reseat both ends of the cable. The 39 inch cable on the Aluminum 4-Port USB 3.0 Hub V2 is removable, so it can work loose at either end.
4. Try a different USB cable if you have one, since a damaged cable will stop the hub from being detected.
5. Try a different USB 3.0 port on your computer. A single dead or low powered port is a common cause.
6. Check whether the hub appears in System Information under USB on a Mac, or in Device Manager on Windows.
7. Plug your USB device straight into the computer to confirm the device itself works, then try that same device in a different port on the hub.
8. Do not expect the hub to charge anything. The Aluminum 4-Port USB 3.0 Hub V2 is not a standalone charger and will not charge phones or tablets.
9. Connect an Apple SuperDrive directly to your computer instead. The Apple SuperDrive has a much higher wattage requirement than the hub can supply, so it cannot run through the Aluminum 4-Port USB 3.0 Hub V2.
10. Avoid connecting the hub through a USB 3.0 PCI-e add-on card, which is not recommended for the Aluminum 4-Port USB 3.0 Hub V2.
11. Restart your computer fully, then reconnect the Aluminum 4-Port USB 3.0 Hub V2 and test again.
12. If the device you connected is a drive, open Disk Utility on a Mac or Disk Management on Windows to see whether the drive appears but is unformatted.