USB Y cable for external power supply

When an external USB device such as a DVD player, Bluray player, hard drive, SSD, or CD drive consumes too much power, the computer is usually having problems. The Mac won't even mount the drive and immediately throws an error that I have already described here.

Use of Y-cables for USB ports

The solution to the problem is a so-called Y-cable, which offers an additional USB connector. Some USB Y cables have a black and a red connector. While the black is plugged into the computer, the red should be plugged into a USB power adapter. Since the cables are often a bit short, there may be one more USB extension makes sense.

The red plug is now used to feed the current from the USB power supply unit into the cable to the external device, while the black cable is the data connection to the computer.

Important: Only USB 3.0 cables offer the highest speeds

When choosing the Y-cable you should make sure that it is compatible with the USB 3.0 standard. Most cables (like the one from delock) only offer USB 2.0. With around 60 MB / s, these cables are still fast enough for DVD players and CD drives. But if you connect hard drives or SSD storage, the Y-cable quickly becomes a bottleneck and slows down any data transfer.

A recommended Y-cable that also supports USB 3.0 is the Goobay model. It has two USB-A plugs and one USB-A socket.

goobay 95749 USB 3.0 Dual Power SuperSpeed ​​Y-USB cable for external HDD / SSD black
  • USB 3.0 Dual Power SuperSpeed ​​cable - 2x USB 3.0 plug (type A) to USB 3.0 socket (type A)
  • Y USB cable for feeding the power from two USB ports, e.g. for energy-intensive devices such as external 2.5 "...
  • UBS 3 SuperSpeed ​​data transfers up to 5 Gbit / s 10 times faster than USB 2.0

For USB 3.0 hard drives and SSD drives

USB 3.0 hard drives and SSD drives often have a different socket and do not have a USB-A port. This USB port is called "USB 3.0 Micro Type B" and looks like this:

The USB Micro Type B port is often found on USB 3.0 hard drives (Photos: Sir Apfelot).

The USB Micro Type B port is often found on USB 3.0 hard drives (Photos: Sir Apfelot).

Goobay also has a suitable cable with USB 3.0 compatibility for this connection, which you can use here at Amazon finds:

Goobay 95746 USB 3.0 Dual Power SuperSpeed ​​cable, black
  • SuperSpeed ​​data transfers up to 5 Gbit / s
  • 10 times faster than USB 2.0
  • Y USB cable for feeding in the power from two USB ports

Even if the article looks like a promotional event for Goobay, I have no connection to this manufacturer. I've been looking for alternatives on Amazon that are also USB 3.0 compatible, but the two Y-cables from Goobay were the only ones I could find.

 

The page contains affiliate links / images: Amazon.de