Western Digital MY PASSPORT ULTRA User Manual page 28

Why is the data transfer rate slow?
How do I determine whether or not my system
supports USB 3.1, USB 3.0 or USB 2.0?
What happens when a USB 3.1, USB 3.0 or USB
2.0 device is plugged into a USB 1.1 port or hub?
My Passport Ultra for Mac
User Manual
motherboard BIOS setting documentation to
disable this feature or visit http:/ /
support.wdc.com and see Knowledge Base
answer ID 1201. For more information about
booting from external drives, refer to your system
documentation or contact your system
manufacturer.
Your system may be operating at USB 1.1 speeds
due to an incorrect driver installation of the USB
3.1, USB 3.0 or USB 2.0 adapter card or a system
that does not support USB 3.1, USB 3.0 or USB
2.0.
Refer to your USB card documentation or contact
your USB card manufacturer.
If your USB 3.1, USB 3.0 or USB 2.0
Note:
controller is built in to the system
motherboard, be sure to install the
appropriate chipset support for your
motherboard. Refer to your
motherboard or system manual for more
information.
USB 3.1, USB 3.0 and USB 2.0 are backward-
compatible with USB 1.1. When connected to a
USB 1.1 port or hub, a USB 3.1, USB 3.0 or USB 2.0
device can transfer data up to 12 Mbps.
If your system includes a PCI Express slot, you
can achieve higher data transfer rates by
installing a PCI Express adapter card. Contact the
card manufacturer for installation procedures and
more information.
Troubleshooting
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